Update AutoRest C# version (Azure#19145)

Co-authored-by: Pavel Krymets <pavel@krymets.com>

Author: azure-sdk

eng/Packages.Data.props

@@ -122,7 +122,7 @@
     All should have PrivateAssets="All" set so they don't become pacakge dependencies
   -->
   <ItemGroup>
-    <PackageReference Update="Microsoft.Azure.AutoRest.CSharp" Version="3.0.0-beta.20210302.1" PrivateAssets="All" />
+    <PackageReference Update="Microsoft.Azure.AutoRest.CSharp" Version="3.0.0-beta.20210302.2" PrivateAssets="All" />
     <PackageReference Update="Azure.ClientSdk.Analyzers" Version="0.1.1-dev.20200929.2" PrivateAssets="All" />
     <PackageReference Update="coverlet.collector" Version="1.3.0" PrivateAssets="All" />
     <PackageReference Update="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="3.3.1" PrivateAssets="All" />

sdk/appconfiguration/Azure.ResourceManager.AppConfiguration/api/Azure.ResourceManager.AppConfiguration.netstandard2.0.cs

@@ -160,12 +160,6 @@ internal ApiKey() { }
         public bool? ReadOnly { get { throw null; } }
         public string Value { get { throw null; } }
     }
-    public partial class ApiKeyListResult
-    {
-        internal ApiKeyListResult() { }
-        public string NextLink { get { throw null; } }
-        public System.Collections.Generic.IReadOnlyList<Azure.ResourceManager.AppConfiguration.Models.ApiKey> Value { get { throw null; } }
-    }
     public partial class CheckNameAvailabilityParameters
     {
         public CheckNameAvailabilityParameters(string name, Azure.ResourceManager.AppConfiguration.Models.ConfigurationResourceType type) { }
@@ -201,12 +195,6 @@ public ConfigurationStore(string location, Azure.ResourceManager.AppConfiguratio
         public Azure.ResourceManager.AppConfiguration.Models.PublicNetworkAccess? PublicNetworkAccess { get { throw null; } set { } }
         public Azure.ResourceManager.AppConfiguration.Models.Sku Sku { get { throw null; } set { } }
     }
-    public partial class ConfigurationStoreListResult
-    {
-        internal ConfigurationStoreListResult() { }
-        public string NextLink { get { throw null; } }
-        public System.Collections.Generic.IReadOnlyList<Azure.ResourceManager.AppConfiguration.Models.ConfigurationStore> Value { get { throw null; } }
-    }
     public partial class ConfigurationStoreUpdateParameters
     {
         public ConfigurationStoreUpdateParameters() { }
@@ -306,12 +294,6 @@ internal OperationDefinitionDisplay() { }
         public string Provider { get { throw null; } }
         public string Resource { get { throw null; } }
     }
-    public partial class OperationDefinitionListResult
-    {
-        internal OperationDefinitionListResult() { }
-        public string NextLink { get { throw null; } }
-        public System.Collections.Generic.IReadOnlyList<Azure.ResourceManager.AppConfiguration.Models.OperationDefinition> Value { get { throw null; } }
-    }
     public partial class PrivateEndpoint
     {
         public PrivateEndpoint() { }
@@ -327,12 +309,6 @@ public PrivateEndpointConnection() { }
         public Azure.ResourceManager.AppConfiguration.Models.ProvisioningState? ProvisioningState { get { throw null; } }
         public string Type { get { throw null; } }
     }
-    public partial class PrivateEndpointConnectionListResult
-    {
-        internal PrivateEndpointConnectionListResult() { }
-        public string NextLink { get { throw null; } }
-        public System.Collections.Generic.IReadOnlyList<Azure.ResourceManager.AppConfiguration.Models.PrivateEndpointConnection> Value { get { throw null; } }
-    }
     public partial class PrivateEndpointConnectionReference
     {
         internal PrivateEndpointConnectionReference() { }
@@ -353,12 +329,6 @@ internal PrivateLinkResource() { }
         public System.Collections.Generic.IReadOnlyList<string> RequiredZoneNames { get { throw null; } }
         public string Type { get { throw null; } }
     }
-    public partial class PrivateLinkResourceListResult
-    {
-        internal PrivateLinkResourceListResult() { }
-        public string NextLink { get { throw null; } }
-        public System.Collections.Generic.IReadOnlyList<Azure.ResourceManager.AppConfiguration.Models.PrivateLinkResource> Value { get { throw null; } }
-    }
     public partial class PrivateLinkServiceConnectionState
     {
         public PrivateLinkServiceConnectionState() { }