Create csharp mute guide

Create csharp mute guide

Author: valindrae

articles/communication-services/how-tos/call-automation/includes/mute-participants-how-to-csharp.md

@@ -0,0 +1,47 @@
+---
+title: include file
+description: C# mute participant
+services: azure-communication-services
+author: Kunaal Punjabi
+ms.service: azure-communication-services
+ms.subservice: azure-communication-services
+ms.date: 03/19/2023
+ms.topic: include
+ms.topic: include file
+ms.author: kpunjabi
+---
+
+## Prerequisites
+
+- Azure account with an active subscription, for details see [Create an account for free.](https://azure.microsoft.com/free/)
+- Azure Communication Services resource. See [Create an Azure Communication Services resource](../../../quickstarts/create-communication-resource.md?tabs=windows&pivots=platform-azp). Save the connection string for this resource. 
+- Create a new web service application using the [Call Automation SDK](../../../quickstarts/call-automation/callflows-for-customer-interactions.md).
+- The latest [.NET library](https://dotnet.microsoft.com/download/dotnet-core) for your operating system.
+- Obtain the NuGet package from the [Azure SDK Dev Feed](https://github.com/Azure/azure-sdk-for-net/blob/main/CONTRIBUTING.md#nuget-package-dev-feed)
+
+## Create a new C# application
+
+In the console window of your operating system, use the `dotnet` command to create a new web application.
+
+```console
+dotnet new web -n MyApplication
+```
+
+## Install the NuGet package
+
+During the preview phase, the NuGet package can be obtained by configuring your package manager to use the Azure SDK Dev Feed from [here](https://github.com/Azure/azure-sdk-for-net/blob/main/CONTRIBUTING.md#nuget-package-dev-feed)
+
+## Establish a call
+
+By this point you should be familiar with starting calls, if you need to learn more about making a call, follow our [quickstart](../../../quickstarts/call-automation/callflows-for-customer-interactions.md). In this quickstart, we'll answer an incoming call.
+
+## Mute participant during a call 
+
+``` csharp
+var target = new CommunicationUserIdentifier(ACS_USER_ID); 
+var callConnection = callAutomationClient.GetCallConnection(CALL_CONNECTION_ID); 
+await callConnection.MuteParticipantsAsync(target, "OperationContext").ConfigureAwait(false);
+```
+
+## Subscribing to events 
+