deprecated netstandard, uwp support in csharp (#4214)

Author: wing328

docs/generators/csharp.md

@@ -10,7 +10,7 @@ sidebar_label: csharp
 |sourceFolder|source folder for generated code| |src|
 |packageGuid|The GUID that will be associated with the C# project| |null|
 |interfacePrefix|Prefix interfaces with a community standard or widely accepted prefix.| |I|
-|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>**v5.0**</dt><dd>.NET Standard 1.3 compatible</dd><dt>**uwp**</dt><dd>Universal Windows Platform (IMPORTANT: this will be decommissioned and replaced by v5.0)</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>**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|
 |modelPropertyNaming|Naming convention for the property: 'camelCase', 'PascalCase', 'snake_case' and 'original', which keeps the original name| |PascalCase|
 |hideGenerationTimestamp|Hides the generation timestamp when files are generated.| |true|
 |sortParamsByRequiredFlag|Sort method arguments to place required parameters before optional parameters.| |true|

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CSharpClientCodegen.java

@@ -132,8 +132,8 @@ public CSharpClientCodegen() {
                 .put(NET35, ".NET Framework 3.5 compatible")
                 .put(NET40, ".NET Framework 4.0 compatible")
                 .put(NET45, ".NET Framework 4.5+ compatible")
-                .put(NETSTANDARD, ".NET Standard 1.3 compatible")
-                .put(UWP, "Universal Windows Platform (IMPORTANT: this will be decommissioned and replaced by v5.0)")
+                .put(NETSTANDARD, ".NET Standard 1.3 compatible (DEPRECATED. Please use `csharp-netcore` generator instead)")
+                .put(UWP, "Universal Windows Platform (DEPRECATED. Please use `csharp-netcore` generator instead)")
                 .build();
         framework.defaultValue(this.targetFramework);
         framework.setEnum(frameworks);
@@ -276,6 +276,7 @@ public void processOpts() {
             setValidatable(Boolean.FALSE);
             setSupportsAsync(Boolean.FALSE);
         } else if (NETSTANDARD.equals(this.targetFramework)) {
+            LOGGER.warn(".NET Standard 1.3 support has been DEPRECATED in this generator. Please use `csharp-netcore` generator instead.");
             // TODO: NETSTANDARD here is misrepresenting a PCL v5.0 which supports .NET Framework 4.6+, .NET Core 1.0, and Windows Universal 10.0
             additionalProperties.put(MCS_NET_VERSION_KEY, "4.6-api");
             if (additionalProperties.containsKey("supportsUWP")) {
@@ -293,6 +294,8 @@ public void processOpts() {
             //Todo implement it
             excludeTests = true;
         } else if (UWP.equals(this.targetFramework)) {
+            LOGGER.warn("UWP support has been DEPRECATED in this generator. Please use `csharp-netcore` generator instead.");
+            // TODO: NETSTANDARD here is misrepresenting a PCL v5.0 which supports .NET Framework 4.6+, .NET Core 1.0, and Windows Universal 10.0
             setTargetFrameworkNuget("uwp");
             setSupportsAsync(Boolean.TRUE);
             setSupportsUWP(Boolean.TRUE);