update doc

Author: wing328

docs/generators/csharp.md

@@ -23,7 +23,7 @@ sidebar_label: csharp
 |returnICollection|Return ICollection<T> instead of the concrete type.| |false|
 |sortParamsByRequiredFlag|Sort method arguments to place required parameters before optional parameters.| |true|
 |sourceFolder|source folder for generated code| |src|
-|targetFramework|The target .NET framework version.|<dl><dt>**v3.5**</dt><dd>.NET Framework 3.5 compatible</dd><dt>**v4.0**</dt><dd>.NET Framework 4.0 compatible</dd><dt>**v4.5**</dt><dd>.NET Framework 4.5 compatible</dd><dt>**v4.5.2**</dt><dd>.NET Framework 4.5.2+ compatible</dd><dt>**v5.0**</dt><dd>.NET Standard 1.3 compatible (DEPRECATED. Please use `csharp-netcore` generator instead)</dd><dt>**uwp**</dt><dd>Universal Windows Platform (DEPRECATED. Please use `csharp-netcore` generator instead)</dd></dl>|v4.5|
+|targetFramework|The target .NET framework version.|<dl><dt>**v3.5**</dt><dd>.NET Framework 3.5 compatible</dd><dt>**v4.0**</dt><dd>.NET Framework 4.0 compatible</dd><dt>**v4.5**</dt><dd>.NET Framework 4.5 compatible</dd><dt>**v4.5.2**</dt><dd>.NET Framework 4.5.2+ compatible</dd><dt>**netstandard1.3**</dt><dd>.NET Standard 1.3 compatible (DEPRECATED. Please use `csharp-netcore` generator instead)</dd><dt>**uwp**</dt><dd>Universal Windows Platform (DEPRECATED. Please use `csharp-netcore` generator instead)</dd></dl>|v4.5|
 |useCollection|Deserialize array types to Collection&lt;T&gt; instead of List&lt;T&gt;.| |false|
 |useCompareNetObjects|Use KellermanSoftware.CompareNetObjects for deep recursive object comparison. WARNING: this option incurs potential performance impact.| |false|
 |useDateTimeOffset|Use DateTimeOffset to model date-time properties| |false|