[AKS] add C# config to readme.md (#4896)

* [AKS] add C# config to readme.md

* Updating csharp tags and fixing python tags so as to address python sdk breaking changes

* Revert some changes now that multi-api should work for python SDK

* Add .NET SDK to "Swagger to SDK" auto-PR section

specification/containerservices/resource-manager/readme.md

@@ -206,12 +206,28 @@ swagger-to-sdk:
   - repo: azure-sdk-for-java
   - repo: azure-sdk-for-go
   - repo: azure-sdk-for-js
+  - repo: azure-sdk-for-net
   - repo: azure-sdk-for-node
   - repo: azure-sdk-for-ruby
     after_scripts:
       - bundle install && rake arm:regen_all_profiles['azure_mgmt_container_service']
 ```
 
+## C#
+
+These settings apply only when `--csharp` is specified on the command line.
+Please also specify `--csharp-sdks-folder=<path to "SDKs" directory of your azure-sdk-for-net clone>`.
+
+``` yaml $(csharp)
+csharp:
+  azure-arm: true
+  license-header: MICROSOFT_MIT_NO_VERSION
+  namespace: Microsoft.Azure.Management.ContainerService
+  payload-flattening-threshold: 1
+  output-folder: $(csharp-sdks-folder)/ContainerService/Management.ContainerService/Generated
+  clear-output-folder: true
+```
+
 ## Go
 
 See configuration in [readme.go.md](./readme.go.md)
@@ -233,6 +249,7 @@ description: "Container Service Client"
 ```
 
 ### Java multi-api
+
 ``` yaml $(java) && $(multiapi)
 batch:
   - tag: package-2017-09-only