CORE SDK Auto Released By yinxi (#262)

发布日志：
1, Update the docs and readme

Author: doublnt

CONTRIBUTING.md

@@ -12,19 +12,9 @@ your [issues][issues] or [pull requests][pull-requests] through GitHub.
    Agreement (CLA)][cla].
 
 - Please submit code that follows these standards.
-   You can choose both [Visual Studio 2017](https://visualstudio.microsoft.com) and [Visual Studio Code](https://visualstudio.microsoft.com) to develop and help you write your code. The `Visual Studio Code` format is:
-   ```json
-   {
-    "csharpfixformat.style.spaces.beforeParenthesis": false,
-    "csharpfixformat.style.newline.atEnd": true,
-    "csharpfixformat.sort.usings.splitGroups": true,
-    "csharpfixformat.style.braces.onSameLine": false,
-    "editor.formatOnType": true,
-    "editor.formatOnPaste": true,
-    "editor.formatOnSave": true,
-    "csharp.format.enable": false
-    }
-   ```
+   You can choose both [Visual Studio 2017](https://visualstudio.microsoft.com) and [VS Code](https://visualstudio.microsoft.com) to develop and help you write your code. 
+
+   The editor config standard is in the aliyun sdk core root folder called `.editorconfig`. If you are develop with `VS Code`, please add `EditorConfig for VS Code` extension.
 
 - We maintain a high percentage of code coverage in our unit tests. If you make
    changes to the code, please add, update, and/or remove tests as appropriate.

README-CN.md

@@ -26,8 +26,9 @@
 
 ## 环境要求
 Alibaba Cloud SDK for .NET 适用于:
-- **`.NET Framework 4.5`** 及其以上版本
-- **`.NET Standard 2.0`** 及其以上版本。
+- **.NET Framework 4.5** 及其以上版本
+- **.NET Standard 2.0** 及其以上版本。
+- **C# 4.0** 及其以上版本
 
 
 ## 安装

README.md

@@ -26,8 +26,9 @@ The Alibaba Cloud SDK for .NET allows you to access Alibaba Cloud services such
 
 ## Requirements
 - The Alibaba Cloud SDK for .NET requires：
-    - **`.NET Framework 4.5`** or later
-    - **`.NET Standard 2.0`** or later
+    - **.NET Framework 4.5** and above
+    - **.NET Standard 2.0** and above
+    - **C# 4.0** and above
 
 
 ## Installation

docs/0-Requirements-CN.md

@@ -3,8 +3,9 @@
 
 # 要求
 首先要保证您安装了相关 [.NET SDK][.net sdk] 和 [.NET RunTime][.net runtime]
-- **`.NET Framework 4.5`** 及其以上版本
-- **`.NET Standard 2.0`** 及其以上版本
+- **.NET Framework 4.5** 及其以上版本
+- **.NET Standard 2.0** 及其以上版本
+- **C# 4.0** 及其以上版本
 
 # 建议
 - 建议使用 **.NET Standard 2.0** 及以上目标框架

docs/0-Requirements-EN.md

@@ -3,8 +3,9 @@
 
 # Requirements
 Make sure you have the relevant [.NET SDK][.net sdk] and [.NET RunTime][.net runtime] installed.
-- **`.NET Framework 4.5`** and above
-- **`.NET Standard 2.0`** and above
+- **.NET Framework 4.5** and above
+- **.NET Standard 2.0** and above
+- **C# 4.0** and above
 
 # Recommendations
 - Recommended use of **.NET Standard 2.0** and above target framework