diff --git a/Sdk/.editorconfig b/Sdk/.editorconfig
new file mode 100644
index 0000000000000000000000000000000000000000..3dda769e61d1eafe9b3af0f8de9ed22b3143e5fb
--- /dev/null
+++ b/Sdk/.editorconfig
@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 4
+end_of_line = lf
+trim_trailing_whitespace = true
+
diff --git a/Sdk/Entity/BaseFileData.cs b/Sdk/Entity/BaseFileData.cs
index 47f9b24a84e37d74f9b616d80b661e7b2c7c4855..9e591689e6881a8af9b8159db07da2c4681cc0bf 100644
--- a/Sdk/Entity/BaseFileData.cs
+++ b/Sdk/Entity/BaseFileData.cs
@@ -1,8 +1,20 @@
-namespace Signit.Sdk.Entity
+namespace Signit.Sdk.Entity
 {
     public class BaseFileData
     {
+        /// <summary>
+        /// 文件数据 URL 地址
+        /// </summary>
         public string Url { get; set; }
+
+        /// <summary>
+        /// 采用 BASE64 编码的文件内容，支持最大约 10MB 文件数据
+        /// </summary>
         public string Base64 { get; set; }
+
+        /// <summary>
+        /// 文件名
+        /// </summary>
+        public string Name { get; set; }
     }
 }
diff --git a/Sdk/Entity/FileData.cs b/Sdk/Entity/FileData.cs
index ea2c98a8b62f2eb3dec104f54dea7e79ab02b37b..b0814a3fc87701fd9590e6940a4f0f4cb5337a84 100644
--- a/Sdk/Entity/FileData.cs
+++ b/Sdk/Entity/FileData.cs
@@ -1,13 +1,31 @@
-namespace Signit.Sdk.Entity
+using System;
+
+namespace Signit.Sdk.Entity
 {
     public class FileData
     {
+        /// <summary>
+        /// 待签名文件（html/pdf/doc/docx/xls/xlsx/ppt/pptx）的URL地址。
+        /// 注意：如果 Url 和 Base64 同时存在，优先使用 Base64
+        /// </summary>
         public string Url { get; set; }
+
+        /// <summary>
+        /// 待签名文件（html/pdf/doc/docx/xls/xlsx/ppt/pptx）数据的 BASE64 编码，
+        /// 支持最大约 10MB 的文件数据。
+        /// 注意：如果 Url 和 Base64 同时存在，优先使用 Base64
+        /// </summary>
         public string Base64 { get; set; }
+
+        /// <summary>
+        /// 待签名的文件是否转换成单页的形式，否则，默认使用A4尺寸自动进行分页。
+        /// 注：待签名文件为html时该值有效，且此单页最大支持的高度为5000mm
+        /// </summary>
         public bool EnableSinglePage { get; set; }
 
         public FileData() { }
 
+        [Obsolete("将在 v1.2 中删除此构造，请使用对象初始化语法代替")]
         public FileData(string url)
         {
             Url = url;
diff --git a/Sdk/Entity/InitialValue.cs b/Sdk/Entity/InitialValue.cs
index e8bf1cc69ab33941f38508dd7728137b892b35d4..4a7bcb64d6cdaeccb66ae68d8b0b71646980d127 100644
--- a/Sdk/Entity/InitialValue.cs
+++ b/Sdk/Entity/InitialValue.cs
@@ -1,73 +1,80 @@
-using Signit.Sdk.Types;
+using Signit.Sdk.Types;
 
 namespace Signit.Sdk.Entity
 {
-    /**
-     * 签名初始化数据。包含印章数据、手写数据、证书数据、证书签名证书秘钥访问口令、证书类型、 渲染模式、签名地理位置、联系方式、签名是否锁定、签名原因。
-     * 印章数据、手写数据仅一个不为空的有效。
-     */
+    /// <summary>
+    /// 签名初始化数据。包含印章数据、手写数据、证书数据、证书签名证书秘钥访问口令、证书类型、
+    /// 渲染模式、签名地理位置、联系方式、签名是否锁定、签名原因。
+    /// 印章数据、手写数据仅一个不为空的有效。
+    /// </summary>
     public class InitialValue
     {
-        /**
-         * 印章数据.
-         */
+        /// <summary>
+        /// 印章数据.
+        /// </summary>
         public SealData SealData { get; set; }
 
-        /**
-         * 手写签名数据.
-         */
+        /// <summary>
+        /// 手写签名数据.
+        /// </summary>
         public WriteData WriteData { get; set; }
 
-        /**
-         * 证书数据.
-         */
+        /// <summary>
+        /// 证书数据.
+        /// </summary>
         public CertData CertData { get; set; }
 
-        /**
-         * 证书签名证书密钥访问口令.
-         */
+        /// <summary>
+        /// 证书签名证书密钥访问口令.
+        /// </summary>
         public string CertPassin { get; set; }
 
-        /**
-         * 证书类型.
-         * 对应枚举：CertType
-         */
+        /// <summary>
+        /// 证书类型.
+        /// 对应枚举：CertType
+        /// </summary>
         public CertType CertType { get; set; }
 
-        /**
-         * 渲染模式. 对应枚举：
-         * 对应枚举：RenderMode
-         */
+        /// <summary>
+        /// 渲染模式. 对应枚举：
+        /// 对应枚举：RenderMode
+        /// </summary>
         public RenderMode RenderingMode { get; set; } = RenderMode.GRAPHIC;
 
-        /**
-         * 签名地理位置.
-         */
+        /// <summary>
+        /// 签名地理位置.
+        /// </summary>
         public string Location { get; set; }
 
-        /**
-         * 联系方式.
-         */
+        /// <summary>
+        /// 联系方式.
+        /// </summary>
         public string Contact { get; set; }
 
-        /**
-         * 签名是否锁定.
-         */
+        /// <summary>
+        /// 签名是否锁定.
+        /// </summary>
         public bool Locked { get; set; }
 
-        /**
-         * 签名原因.
-         */
+        /// <summary>
+        /// 签名原因.
+        /// </summary>
         public string Reason { get; set; }
 
-        /**
-         * 文本框文本内容
-         */
+        /// <summary>
+        /// 文本框文本内容
+        /// </summary>
         public string TextContent { get; set; }
 
-        /**
-         * 二维码内容字符串.
-         */
+        /// <summary>
+        /// 二维码内容字符串.
+        /// </summary>
         public string QrcodeContent { get; set; }
+
+        /// <summary>
+        /// 时间表单的时间戳（单位：毫秒（ms））.
+        /// @since v1.1
+        /// </summary>
+        public long Timestamp { get; set; }
     }
-}
\ No newline at end of file
+}
diff --git a/Sdk/Entity/KeywordPosition.cs b/Sdk/Entity/KeywordPosition.cs
index d928c7af7e81dc5c9445d9b6d69a80af0df94c97..f338530c1d57480e30f531f59e64eac11b3faadf 100644
--- a/Sdk/Entity/KeywordPosition.cs
+++ b/Sdk/Entity/KeywordPosition.cs
@@ -1,4 +1,4 @@
-using Signit.Sdk.Types;
+using Signit.Sdk.Types;
 
 namespace Signit.Sdk.Entity
 {
@@ -15,6 +15,9 @@ namespace Signit.Sdk.Entity
         public float? Scale { get; set; }
         public string Pages { get; set; }
 
+        public string ReplaceTextAfterLocate { get; set; }
+        public bool DeleteTextAfterLocate { get; set; }
+
         /// <summary>
         /// x 方向的便移量 正是往右，负是往左，坐标缩放前进行最后的微调参数
         /// </summary>
diff --git a/Sdk/Entity/Receiver.cs b/Sdk/Entity/Receiver.cs
index 65fcbc520a0688a202bf3cae416d0279d01850f9..c311e8b22d2bc204c85af9d3d26e383710bededb 100644
--- a/Sdk/Entity/Receiver.cs
+++ b/Sdk/Entity/Receiver.cs
@@ -1,85 +1,130 @@
-using Signit.Sdk.Types;
 using System.Collections.Generic;
+using Signit.Sdk.Types;
 
 namespace Signit.Sdk.Entity
 {
-    /**
-     * 接收方信息。 包含接收方名字、接收方联系方式、安全等级、接收方类型、 接收方是否必须预分配表单域、设置接收方私人信息、接收方处理顺序、
-     * 签署认证等级、接收方所在企业名称、信封自定义元数据信息、预设表单信息.
-     */
+    /// <summary>
+    /// 接收方信息。 包含接收方名字、接收方联系方式、安全等级、接收方类型、
+    /// 接收方是否必须预分配表单域、设置接收方私人信息、接收方处理顺序、
+    /// 签署认证等级、接收方所在企业名称、信封自定义元数据信息、预设表单信息.
+    /// </summary>
     public class Receiver
     {
-        /**
-         * 接收方名字.
-         */
+        /// <summary>
+        /// 接收方名字.
+        /// </summary>
         public string Name { get; set; }
-        /**
-         * 接收方联系方式.
-         */
+
+        /// <summary>
+        /// 接收方联系方式.
+        /// </summary>
         public Contact Contact { get; set; }
-        /**
-         * 安全等级.
-         * </p>
-         * 对应枚举：SecureLevel
-         * 
-         */
+
+        /// <summary>
+        /// 安全等级.
+        /// </p>
+        /// 对应枚举：SecureLevel
+        ///
+        /// </summary>
         public SecureLevel SecureLevel { get; set; }
-        /**
-         * 接收方类型。 接收方类型：ReceiverType
-         * 
-         */
+
+        /// <summary>
+        /// 接收方类型。 接收方类型：ReceiverType
+        ///
+        /// </summary>
         public ReceiverType Type { get; set; }
-        /**
-         * 接收方是否必须预分配表单域.
-         */
+
+        /// <summary>
+        /// 接收方是否必须预分配表单域.
+        /// </summary>
         public bool NeedForm { get; set; }
-        /**
-         * 设置接收方私人信息.
-         */
+
+        /// <summary>
+        /// 设置接收方私人信息.
+        /// </summary>
         public string AssignedMessage { get; set; }
-        /**
-         * 接收方处理顺序.
-         */
+
+        /// <summary>
+        /// 接收方处理顺序.
+        /// </summary>
         public int AssignedSequence { get; set; }
 
-        /**
-         * 接收方所在企业名称.
-         */
+        /// <summary>
+        /// 接收方所在企业名称.
+        /// </summary>
         public string EnterpriseName { get; set; }
-        /**
-         * 信封自定义元数据信息.
-         */
+
+        /// <summary>
+        /// 信封自定义元数据信息.
+        /// </summary>
         public string Metadata { get; set; }
-        /**
-         * 预设表单信息.
-         */
+
+        /// <summary>
+        /// 预设表单信息.
+        /// </summary>
         public IList<PresetForm> PresetForms { get; set; }
 
         public EnvelopeRoleType RoleType { get; set; }
 
-        /**
-         * 流程完成后删除当前参与者的信封。 默认：false
-         * 
-         */
+        /// <summary>
+        /// 流程完成后删除当前参与者的信封。 默认：false
+        /// </summary>
         public bool DeleteCompletedEnvelope { get; set; }
-        /**
-         * 参与者处理表单各种模式的枚举
-         */
+
+        /// <summary>
+        /// 参与者处理表单各种模式的枚举
+        /// </summary>
         public ParticipantHandleMode HandleMode { get; set; }
 
         public IList<AuthType> SelectedAuthTypes { get; set; }
 
-        /**
-         * 启用嵌入模式，调用方系统中直接嵌入易企签WEB流程时设置为true，签署流程消息只会通过webhook事件消息方式通知，用户在易企签平台设置的短信/邮件等消息将自动屏蔽。非必填，默认值：false.
-         * @since 2.1.0
-         */
+        /// <summary>
+        /// 启用嵌入模式，调用方系统中直接嵌入易企签WEB流程时设置为true，
+        /// 签署流程消息只会通过webhook事件消息方式通知，用户在易企签平台设置的短信/邮件等消息将自动屏蔽。
+        /// 非必填，默认值：false.
+        /// </summary>
         public bool EnableEmbeddedMode { get; set; }
 
-        /**
-         * 签署接收方用户在调用方系统的唯一标识.<br/>
-         * enableEmbeddedMode为false时，非必填；当enableEmbeddedMode为true时，则必填。默认：null
-         * @since 2.1.0
-         */
+        /// <summary>
+        /// 签署接收方用户在调用方系统的唯一标识.
+        /// enableEmbeddedMode为false时，非必填；当enableEmbeddedMode为true时，则必填。默认：null
+        /// </summary>
         public string ClientId { get; set; }
+
+        /// <summary>
+        /// 参与者唯一标识.
+        /// @since v1.1
+        /// </summary>
+        public string ParticipantWsid { get; set; }
+
+        /// <summary>
+        /// 是否是外部.
+        /// @since v1.1
+        /// </summary>
+        public bool IsExternal { get; set; }
+
+        /// <summary>
+        /// 是否是委托外部.
+        /// @since v1.1
+        /// </summary>
+        public bool IsEntrust { get; set; }
+
+        /// <summary>
+        /// 是否允许撤销.
+        /// @since v1.1
+        /// </summary>
+        public bool AllowRevoke { get; set; }
+
+        /// <summary>
+        /// 是否区分顺序.
+        /// @since v1.1
+        /// </summary>
+        public bool SequenceSensitive { get; set; }
+
+        /// <summary>
+        /// 用户ID.
+        /// @since v1.1
+        /// </summary>
+        public string UserWsid { get; set; }
     }
 }
diff --git a/Sdk/HISTORY.md b/Sdk/HISTORY.md
new file mode 100644
index 0000000000000000000000000000000000000000..7f0a1ce2b2fe8e1bb20e4db32fee5967923ae77b
--- /dev/null
+++ b/Sdk/HISTORY.md
@@ -0,0 +1,18 @@
+# 升级历史简要记录
+
+> Ref Repository (Java)
+>
+> - https://github.com/signit-wesign/java-sdk.git
+> - https://github.com/signit-wesign/java-sdk-sample
+
+## v1.0.1 <sub>2020-06-05</sub>
+
+> *Ref: [java-sdk]: `575a3bc7fcb5e2b817ea1a9fe1e1899d30fe89d2`*
+
+### 已知问题
+
+- 没有 `cn.signit.sdk.type.WebhookEventType`
+
+## v1.0.0 <sub>2019-05-26</sub>
+
+> *Ref: java-sdk: `c06f5d4156657198d61f8ba7f4816cdf848fa8d6`*
\ No newline at end of file
diff --git a/Sdk/Http/Enterprise/EnterpriseVerifyRequest.cs b/Sdk/Http/Enterprise/EnterpriseVerifyRequest.cs
index 0745b3e7e3be9a690f5a6244162b0566638fce8c..915eb7fb9bf45a48fdd79c382d5cc0446a2b57f7 100644
--- a/Sdk/Http/Enterprise/EnterpriseVerifyRequest.cs
+++ b/Sdk/Http/Enterprise/EnterpriseVerifyRequest.cs
@@ -1,6 +1,6 @@
-using Signit.Sdk.Entity;
-using Signit.Sdk.Types;
 using System.Collections.Generic;
+using Signit.Sdk.Entity;
+using Signit.Sdk.Types;
 
 namespace Signit.Sdk.Http.Enterprise
 {
@@ -54,6 +54,12 @@ namespace Signit.Sdk.Http.Enterprise
         /// </summary>
         public EnterpriseAuthType AuthType { get; set; }
 
+        /// <summary>
+        /// 设置经办人或者法人的个人实名认证方式，默认为：PHONE_AUTH
+        /// @since v1.1
+        /// </summary>
+        public List<PersonAuthType> AuthModes { get; set; }
+
         /// <summary>
         /// 企业对公银行信息.
         /// </summary>
@@ -63,5 +69,13 @@ namespace Signit.Sdk.Http.Enterprise
         /// 额外认证所需照片信息数组.
         /// </summary>
         public IList<IdCardImage> ExtraAuthImages { get; set; }
+
+        /// <summary>
+        /// 启用嵌入模式，调用方系统中直接嵌入易企签WEB流程时设置为true，
+        /// 签署流程消息只会通过webhook事件消息方式通知，用户在易企签平台设置的短信/邮件等消息将自动屏蔽。
+        /// 非必填，默认值：false.
+        /// @since v1.1
+        /// </summary>
+        public bool? EnableEmbeddedMode { get; set; }
     }
-}
\ No newline at end of file
+}
diff --git a/Sdk/Http/Envelope/EnvelopeBasicInfo.cs b/Sdk/Http/Envelope/EnvelopeBasicInfo.cs
index 4ee4af034ba141bc9d83ed7ee0e89361f47f6497..c685ac051825d0702a5bd5aed92ca6a167b2b004 100644
--- a/Sdk/Http/Envelope/EnvelopeBasicInfo.cs
+++ b/Sdk/Http/Envelope/EnvelopeBasicInfo.cs
@@ -1,37 +1,55 @@
-using Signit.Sdk.Types;
+using Signit.Sdk.Types;
 
 namespace Signit.Sdk.Http.Envelope
 {
-    /**
-     * 信封基本信息. 包含信封标题、信封主题、信封类型、信封认证等级、自定义元数据信息.
-     */
+    /// <summary>
+    /// 信封基本信息. 包含信封标题、信封主题、信封类型、信封认证等级、自定义元数据信息.
+    /// </summary>
     public class EnvelopeBasicInfo
     {
-        /**
-         * 信封标题.
-         */
+        /// <summary>
+        /// 信封标题.
+        /// </summary>
         public string Title { get; set; }
 
-        /**
-         * 信封主题.
-         */
+        /// <summary>
+        /// 信封主题.
+        /// </summary>
         public string Subject { get; set; }
 
-        /**
-         * 信封类型.
-         * 对应枚举：EnvelopeType
-         */
+        /// <summary>
+        /// 信封类型.
+        /// 对应枚举：EnvelopeType
+        /// </summary>
         public EnvelopeType Type { get; set; }
 
-        /**
-         * 信封认证等级.
-         * 对应枚举：AuthLevel
-         */
+        /// <summary>
+        /// 信封认证等级.
+        /// 对应枚举：AuthLevel
+        /// </summary>
         public AuthLevel AuthLevel { get; set; }
 
-        /**
-         * 自定义元数据信息.
-         */
+        /// <summary>
+        /// 自定义元数据信息.
+        /// </summary>
         public string Metadata { get; set; }
+
+        /// <summary>
+        /// 时间单位：天；如果 `当前时间 > 信封发起时间 + 逾期时间` 后，信封将不可签署
+        /// @since v1.1
+        ///</summary>
+        public int? Expire { get; set; }
+
+        /// <summary>
+        /// 信封ID.
+        /// @since v1.1
+        ///</summary>
+        public string EnvelopeWsid { get; set; }
+
+        /// <summary>
+        /// 模式.
+        /// @since v1.1
+        ///</summary>
+        public string Mode { get; set; }
     }
-}
\ No newline at end of file
+}
diff --git a/Sdk/Http/HttpClientSync.Response.cs b/Sdk/Http/HttpClientSync.Response.cs
index 546d403f914242dadc5578b38fc6fec565f26d34..9ed173d3ed344daf0c8fe07fb24e273e36fbefd3 100644
--- a/Sdk/Http/HttpClientSync.Response.cs
+++ b/Sdk/Http/HttpClientSync.Response.cs
@@ -1,5 +1,6 @@
-using Newtonsoft.Json;
 using System.Net;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
 
 namespace Signit.Sdk.Http
 {
@@ -15,7 +16,33 @@ namespace Signit.Sdk.Http
             {
                 return string.IsNullOrWhiteSpace(Content)
                     ? default(T)
-                    : JsonConvert.DeserializeObject<T>(Content);
+                    : FromJson<T>(Content);
+            }
+
+            private T FromJson<T>(string json)
+            {
+                try
+                {
+                    var jo = JsonConvert.DeserializeObject(json) as JObject;
+
+                    if (jo.ContainsKey("error"))
+                    {
+                        throw new SignitException(jo
+                            .GetValue("error")
+                            .Value<string>());
+                    }
+
+                    if (jo.ContainsKey("errorWsid"))
+                    {
+                        throw new SignitException(json);
+                    }
+
+                    return jo.ToObject<T>();
+                }
+                catch (JsonSerializationException jse)
+                {
+                    throw new SignitException(jse);
+                }
             }
         }
     }
diff --git a/Sdk/Http/JsonContent.cs b/Sdk/Http/JsonContent.cs
index 28253da1e377ee0e543eb3a7c64ed01f223d3a72..ddb15d6090e382d8a4dc9fd897e718adae458208 100644
--- a/Sdk/Http/JsonContent.cs
+++ b/Sdk/Http/JsonContent.cs
@@ -1,8 +1,6 @@
-using Newtonsoft.Json;
-using Newtonsoft.Json.Converters;
-using Newtonsoft.Json.Serialization;
-using System.Net.Http;
+using System.Net.Http;
 using System.Text;
+using Signit.Sdk.Util;
 
 namespace Signit.Sdk.Http
 {
@@ -10,22 +8,6 @@ namespace Signit.Sdk.Http
     {
         public JsonContent(object model) : base(ToJson(model), Encoding.UTF8, "application/json") { }
 
-        private static readonly JsonSerializerSettings defaultJsonSettings = CreateDefaultJsonSettings();
-
-        private static JsonSerializerSettings CreateDefaultJsonSettings()
-        {
-            var settings = new JsonSerializerSettings
-            {
-                ContractResolver = new CamelCasePropertyNamesContractResolver(),
-            };
-
-            settings.Converters.Add(new StringEnumConverter());
-            return settings;
-        }
-
-        private static string ToJson(object model, JsonSerializerSettings settings = null)
-        {
-            return JsonConvert.SerializeObject(model, settings ?? defaultJsonSettings);
-        }
+        private static string ToJson(object model) => model.ToJson();
     }
 }
diff --git a/Sdk/Http/Webhook/EnvelopeStarted.cs b/Sdk/Http/Webhook/EnvelopeStarted.cs
index 532a2812c03517e05d11d7a6088f1dea6d70b26d..5d8215bc0a3dddb1ffcc694221634d5e84c95b49 100644
--- a/Sdk/Http/Webhook/EnvelopeStarted.cs
+++ b/Sdk/Http/Webhook/EnvelopeStarted.cs
@@ -1,28 +1,40 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace Signit.Sdk.Http.Webhook
 {
     public class EnvelopeStarted : AbstractWebhookResponse
     {
-        // 执行的动作对应的URL地址
+        /// <summary>
+        /// 执行的动作对应的URL地址
+        /// </summary>
         public string ActionUrl { get; set; }
 
-        // 流程允许在易企签WEB执行的动作
+        /// <summary>
+        /// 流程允许在易企签WEB执行的动作
+        /// </summary>
         public IList<string> Actions { get; set; }
 
-        // 接收方对应的在易企签的帐号
+        /// <summary>
+        /// 接收方对应的在易企签的帐号
+        /// </summary>
         public string Account { get; set; }
 
-        // 信封基本信息
+        /// <summary>
+        /// 信封基本信息
+        /// </summary>
         public RawDataBasicInfo BasicEnvelope { get; set; }
 
         public Sender SenderParticipant { get; set; }
         public Receiver ReceiverParticipant { get; set; }
 
-        // 已完成的签署数据
+        /// <summary>
+        /// 已完成的签署数据
+        /// </summary>
         public SignData SignData { get; set; }
 
-        // 客户端回调地址
+        /// <summary>
+        /// 客户端回调地址
+        /// </summary>
         public string ReturnUrl { get; set; }
     }
 }
diff --git a/Sdk/Http/Webhook/RawDataBasicInfo.cs b/Sdk/Http/Webhook/RawDataBasicInfo.cs
index a68643cba4a596db80773fce36e1fdac7e3b268d..6df9d8bc4d8d8204c958d0a4487f42465c73aace 100644
--- a/Sdk/Http/Webhook/RawDataBasicInfo.cs
+++ b/Sdk/Http/Webhook/RawDataBasicInfo.cs
@@ -1,31 +1,68 @@
-namespace Signit.Sdk.Http.Webhook
+namespace Signit.Sdk.Http.Webhook
 {
-    /**
-     * 信封基本信息.
-     *
-     * @since 2.0.0
-     */
+    /// <summary>
+    /// 信封基本信息.
+    /// </summary>
     public class RawDataBasicInfo
     {
-        // 信封全局唯一ID
+        /// <summary>
+        /// 信封全局唯一ID
+        /// </summay>
         public string Wsid { get; set; }
 
-        // 信封状态
+        /// <summary>
+        /// 信封发起者ID
+        /// </summay>
+        public string SenderWsid { get; set; }
+
+        /// <summary>
+        /// 信封发起者名字
+        /// </summay>
+        public string SenderName { get; set; }
+
+        /// <summary>
+        /// 信封状态
+        /// </summay>
         public string Status { get; set; }
 
-        // 信封创建时间
+        /// <summary>
+        /// 信封类型
+        /// </summay>
+        public string Type { get; set; }
+
+        /// <summary>
+        /// 信封标题
+        /// </summay>
+        public string Title { get; set; }
+
+        /// <summary>
+        /// 信封主题
+        /// </summay>
+        public string Subject { get; set; }
+
+        /// <summary>
+        /// 信封创建时间
+        /// </summay>
         public long? CreatedDatetime { get; set; }
 
-        // 信封过期时间
+        /// <summary>
+        /// 信封过期时间
+        /// </summay>
         public long? ExpireDatetime { get; set; }
 
-        // 信封最新状态时间
+        /// <summary>
+        /// 信封最新状态时间
+        /// </summay>
         public long? StatusDatetime { get; set; }
 
-        // 信封最新状态原因
+        /// <summary>
+        /// 信封最新状态原因
+        /// </summay>
         public string StatusReason { get; set; }
 
-        // 当前签署方的序号
+        /// <summary>
+        /// 当前签署方的序号
+        /// </summay>
         public int? CurrentSequence { get; set; }
     }
 }
diff --git a/Sdk/Http/Webhook/WebhookDataBase.cs b/Sdk/Http/Webhook/WebhookDataBase.cs
index e93638470b4ea179a77bab4897cf50812e9711b9..ab05580c931e3cc6b82f7c30a91cf37a78453bed 100644
--- a/Sdk/Http/Webhook/WebhookDataBase.cs
+++ b/Sdk/Http/Webhook/WebhookDataBase.cs
@@ -1,11 +1,11 @@
-namespace Signit.Sdk.Http.Webhook
+namespace Signit.Sdk.Http.Webhook
 {
     public class WebhookDataBase
     {
         public string Event { get; set; }
         public SourceType Source { get; set; }
         public TargetType Target { get; set; }
-        public bool NeedCallback { get; set; }
+        public bool? NeedCallBack { get; set; }
 
         public class SourceType
         {
diff --git a/Sdk/Properties/AssemblyInfo.cs b/Sdk/Properties/AssemblyInfo.cs
index 4a7bf64a80a2b6547324dd884f996f731a74fd03..7418c03dba3deee724b0d53f5e0128bed2a7d8f5 100644
--- a/Sdk/Properties/AssemblyInfo.cs
+++ b/Sdk/Properties/AssemblyInfo.cs
@@ -1,4 +1,4 @@
-using System.Reflection;
+using System.Reflection;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
@@ -10,7 +10,7 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyConfiguration("")]
 [assembly: AssemblyCompany("SignIt")]
 [assembly: AssemblyProduct("Sdk")]
-[assembly: AssemblyCopyright("Copyright © SignIt 2019")]
+[assembly: AssemblyCopyright("Copyright © SignIt 2020")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // 可以指定所有值，也可以使用以下所示的 "*" 预置版本号和修订号
 //通过使用 "*"，如下所示:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]
+[assembly: AssemblyVersion("1.1.1.0")]
+[assembly: AssemblyFileVersion("1.1.1.0")]
diff --git a/Sdk/Sdk.csproj b/Sdk/Sdk.csproj
index 6417192fe6cf1661bde441a8c4ec538606e10ebe..269d1c767ba9dc2e3877c702927abce8601eec86 100644
--- a/Sdk/Sdk.csproj
+++ b/Sdk/Sdk.csproj
@@ -153,7 +153,6 @@
     <Compile Include="Types\FileType.cs" />
     <Compile Include="Types\FormType.cs" />
     <Compile Include="Types\IdCardType.cs" />
-    <Compile Include="Types\NamingStyle.cs" />
     <Compile Include="Types\ParticipantHandleMode.cs" />
     <Compile Include="Types\PersonAuthType.cs" />
     <Compile Include="Types\ReceiverType.cs" />
@@ -161,13 +160,16 @@
     <Compile Include="Types\SecureLevel.cs" />
     <Compile Include="Types\TokenType.cs" />
     <Compile Include="Util\AesTool.cs" />
+    <Compile Include="Util\Json.cs" />
     <Compile Include="Util\SignitStreamWriter.cs" />
     <Compile Include="Util\HmacSignatureBuilder.cs" />
     <Compile Include="Util\InternalTool.cs" />
     <Compile Include="Util\SymmetricTool.cs" />
   </ItemGroup>
   <ItemGroup>
+    <None Include=".editorconfig" />
     <None Include="app.config" />
+    <None Include="HISTORY.md" />
     <None Include="packages.config" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
diff --git a/Sdk/SignitClient.cs b/Sdk/SignitClient.cs
index 02e1cf20d59c066093596279f807b47a20972fc4..a9690fc4bfa68c45cf74f8886b0ed282e7914679 100644
--- a/Sdk/SignitClient.cs
+++ b/Sdk/SignitClient.cs
@@ -1,16 +1,47 @@
-using Newtonsoft.Json;
+/**
+ * The MIT License (MIT)
+ * 
+ * Copyright (C) 2018 signit.cn
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+using System.Collections.Specialized;
+using System.Threading;
+using Newtonsoft.Json;
 using Signit.Sdk.Http;
 using Signit.Sdk.Http.Webhook;
 using Signit.Sdk.Types;
 using Signit.Sdk.Util;
-using System.Collections.Specialized;
-using System.Diagnostics;
 using Viyi.Util;
 
 namespace Signit.Sdk
 {
+    // TODO 还没有添加重试机制
+
+    /// <summary>
+    /// 易企签快捷签署 Java SDK的基本操作类.
+    /// </summary>
     public class SignitClient
     {
+        private const int MAX_COUNT = 3;
+
         public static WebhookData ParseWebhookData(string raw)
         {
             return JsonConvert.DeserializeObject<WebhookData>(raw);
@@ -25,14 +56,25 @@ namespace Signit.Sdk
         private readonly ApiOptions options;
 
         //private HttpClientWrapper httpClient;
-        //private readonly int MAX_COUNT = 3;
         //private readonly AtomicInteger count = new AtomicInteger(MAX_COUNT);
         //private const Pattern LEFT_QUOTATION = Pattern.compile("\"\\{");
         //private const Pattern RIGHT_QUOTATION = Pattern.compile("\\}\"");
         //private const Pattern BACKLASH_QUOTATION = Pattern.compile("\\\\\"");
 
-        public string BaseUrl { get; set; }
-        public string OAuthTokenUrl { get; set; }
+        private ThreadLocal<string> baseUrl = new ThreadLocal<string>();
+        private ThreadLocal<string> oAuthTokenUrl = new ThreadLocal<string>();
+
+        public string BaseUrl
+        {
+            get => baseUrl.Value;
+            set => baseUrl.Value = value;
+        }
+
+        public string OAuthTokenUrl
+        {
+            get => oAuthTokenUrl.Value;
+            set => oAuthTokenUrl.Value = value;
+        }
 
         public SignitClient(ApiOptions options = null) : this(null, null, options) { }
 
@@ -144,7 +186,7 @@ namespace Signit.Sdk
                 .Post(BaseUrl, request, headers);
 
             var result = response.GetObject<T>();
-            if (!result.IsSuccess)
+            if (result?.IsSuccess != true)
             {
                 result.Error = response.GetObject<ErrorResponse>();
             }
diff --git a/Sdk/Types/FormType.cs b/Sdk/Types/FormType.cs
index 074c598daae92fa9bdff12af3388eb39b02af179..bfdf00c8eec1322ca11f598ca6dfe88ff9f4ea32 100644
--- a/Sdk/Types/FormType.cs
+++ b/Sdk/Types/FormType.cs
@@ -1,33 +1,30 @@
 namespace Signit.Sdk.Types
 {
-    /**
-     * 
-     * 表单类型枚举.
-     *
-     * @since 2.0.0
-     */
+    /// <summary>
+    /// 表单类型枚举.
+    /// @since v1.0
+    /// </summary>
     public enum FormType
     {
-
-        /**
-         * 印章签名表单域
-         */
+        /// <summary>印章签名表单域</summary>
         SEAL_SIGN,
-        /**
-         * 手写签名表单域
-         */
+
+        /// <summary>手写签名表单域</summary>
         WRITE_SIGN,
-        /**
-         * 文本表单域
-         */
+
+        /// <summary>文本表单域</summary>
         TEXT,
-        /**
-         * 骑缝章表单域
-         */
+
+        /// <summary>骑缝章表单域</summary>
         MULTI_CHECK_MARK,
-        /**
-         * 二维码骑缝章表单域
-         */
-        MULTI_QRCODE_MARK
+
+        /// <summary>二维码骑缝章表单域</summary>
+        MULTI_QRCODE_MARK,
+
+        /// <summary>
+        /// 时间戳表单
+        /// @since v1.1
+        /// </summary>
+        DATE,
     }
-}
\ No newline at end of file
+}
diff --git a/Sdk/Types/IdCardType.cs b/Sdk/Types/IdCardType.cs
index ae9990fdd4994d027b136488ca9b4e8b67d89716..a81690eddd71251c8490eb7f47563b67ceefa5f9 100644
--- a/Sdk/Types/IdCardType.cs
+++ b/Sdk/Types/IdCardType.cs
@@ -1,25 +1,36 @@
 namespace Signit.Sdk.Types
 {
-    /**
-     * 
-     * 身份证类型枚举.
-     * 
-     * @since 1.0.2
-     */
+    /// <summary>
+    /// 身份证类型枚举
+    /// @since 1.0
+    /// </summary>
     public enum IdCardType
     {
-        /**
-         * 二代身份证
-         */
+        /// <summary>二代身份证</summary>
         SECOND_GENERATION_IDCARD,
-        /**
-         * 临时身份证
-         */
+
+        /// <summary>临时身份证</summary>
         TEMPORARY_IDCARD,
-        /**
-         * 护照
-         */
-        PASSPORT
 
+        /// <summary>护照</summary>
+        PASSPORT,
+
+        /// <summary>
+        /// 香港身份证
+        /// @since v1.1
+        /// </summary>
+        HONG_KONG_IDCARD,
+
+        /// <summary>
+        /// 澳门身份证
+        /// @since v1.1
+        /// </summary>
+        MA_CAO_IDCARD,
+
+        /// <summary>
+        /// 台湾身份证
+        /// @since v1.1
+        /// </summary>
+        TAI_WAN_IDCARD,
     }
-}
\ No newline at end of file
+}
diff --git a/Sdk/Types/NamingStyle.cs b/Sdk/Types/NamingStyle.cs
deleted file mode 100644
index 23138ce82f493108676e00b1201be8c26fd74182..0000000000000000000000000000000000000000
--- a/Sdk/Types/NamingStyle.cs
+++ /dev/null
@@ -1,31 +0,0 @@
-namespace Signit.Sdk.Types
-{
-    /**
-     * 命名风格的枚举.
-     * 
-     * @author zhd
-     * @since 1.0.0
-     */
-    public enum NamingStyle
-    {
-        /**
-         * 小驼峰命名风格.如：nameStyle
-         */
-        CAMEL,
-
-        /**
-         * 字母间均大写命名风格.如：NameStyle
-         */
-        PASCAL,
-
-        /**
-         * 字母间均以下划线分隔命名风格（unix命名风格）.如：name_style
-         */
-        SNAKE,
-
-        /**
-         * 字母间均以连词符分隔命名风格.如：name-style
-         */
-        KEBAB
-    }
-}
diff --git a/Sdk/Types/ParticipantHandleMode.cs b/Sdk/Types/ParticipantHandleMode.cs
index b73840cc6464a21b84902dfba6f32cfe385f7f03..ce36477d5f1bf81b67b98fa68265c50efc21762b 100644
--- a/Sdk/Types/ParticipantHandleMode.cs
+++ b/Sdk/Types/ParticipantHandleMode.cs
@@ -1,25 +1,22 @@
 namespace Signit.Sdk.Types
 {
-    /**
-     * 参与者处理表单的模式枚举
-     *
-     * @since 2.0.0
-     */
+    /// <summary>
+    /// 参与者处理表单的模式枚举
+    /// </summary>
     public enum ParticipantHandleMode
     {
-        /**
-         * 正常处理模式（默认）.
-         * 
-         * @since 2.0.0
-         */
+        /// <summary>
+        /// 正常处理模式（默认）.
+        /// </summary>
         NORMAL,
-        /**
-         * 静默处理模式.
-         * 该接受方不用执行签署流程，自动完成签署。接收方设置为静默签署条件：①接收方类型为签署者SIGNER；②接收方和发起方为同一企业下的同一人；③该接收方有预设表单，且该接收方的预设表单均设置了初始值(手写签名表单除外)。
-         * 
-         * @since 2.0.0
-         */
-        SILENCE
 
+        /// <summary>
+        /// 静默处理模式。
+        /// 该接受方不用执行签署流程，自动完成签署。接收方设置为静默签署条件：
+        /// - ① 接收方类型为签署者SIGNER；
+        /// - ② 接收方和发起方为同一企业下的同一人；
+        /// - ③ 该接收方有预设表单，且该接收方的预设表单均设置了初始值(手写签名表单除外)。
+        /// </summary>
+        SILENCE,
     }
 }
\ No newline at end of file
diff --git a/Sdk/Types/PersonAuthType.cs b/Sdk/Types/PersonAuthType.cs
index aa78860ee100b996bc5a954a74214b5ade1e6469..75eb2aae2565c84d3e56e07565703b03d920718e 100644
--- a/Sdk/Types/PersonAuthType.cs
+++ b/Sdk/Types/PersonAuthType.cs
@@ -1,16 +1,30 @@
 namespace Signit.Sdk.Types
 {
-    /**
-     * 个人实名认证方式
-     *
-     * @since 2.1.0
-     */
+    /// <summary>
+    /// 个人实名认证方式
+    /// @since v1.0
+    /// </summary>
     public enum PersonAuthType
     {
-        /**
-         * 三网手机号三元素实名认证方式
-         */
-        PHONE_AUTH
+        /// <summary>三网手机号三元素实名认证方式</summary>
+        PHONE_AUTH,
 
+        /// <summary>
+        /// 人脸识别认证方式
+        /// @since v1.1
+        /// </summary>
+        FACE_AUTH,
+
+        /// <summary>
+        /// 支付宝芝麻认证方式
+        /// @since v1.1
+        /// </summary>
+        ZM_AUTH,
+
+        /// <summary>
+        /// 三网手机号三元素实名认证+人脸识别认证，双重认证方式
+        /// @since v1.1
+        /// </summary>
+        PHONE_FACE_AUTH,
     }
 }
\ No newline at end of file
diff --git a/Sdk/Util/Json.cs b/Sdk/Util/Json.cs
new file mode 100644
index 0000000000000000000000000000000000000000..a629208a63eeb02b322897cd727c64ac222b1a9a
--- /dev/null
+++ b/Sdk/Util/Json.cs
@@ -0,0 +1,48 @@
+using System;
+using System.IO;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+using Newtonsoft.Json.Serialization;
+
+namespace Signit.Sdk.Util
+{
+    public static class Json
+    {
+        private static readonly JsonSerializerSettings defaultJsonSettings = CreateDefaultJsonSettings();
+
+        private static JsonSerializerSettings CreateDefaultJsonSettings()
+        {
+            var settings = new JsonSerializerSettings
+            {
+                ContractResolver = new CamelCasePropertyNamesContractResolver(),
+            };
+
+            settings.Converters.Add(new StringEnumConverter());
+            return settings;
+        }
+
+        public static string ToJson(this object model, JsonSerializerSettings settings = null)
+        {
+            return JsonConvert.SerializeObject(model, settings ?? defaultJsonSettings);
+        }
+
+        public static string ToJson(this object model, Action<JsonSerializerSettings> configure)
+        {
+            if (configure == null) { return ToJson(model); }
+            var settings = CreateDefaultJsonSettings();
+            configure(settings);
+            return ToJson(model, settings);
+        }
+
+        public static T FromFile<T>(string filePath)
+        {
+            using (var reader = new StreamReader(filePath))
+            using (var jsonReader = new JsonTextReader(reader))
+            {
+                var jo = JToken.ReadFrom(jsonReader) as JObject;
+                return jo.ToObject<T>();
+            }
+        }
+    }
+}