Updated pipeline dotnet

azure-pipelines.yml

@@ -11,6 +11,11 @@ variables:
   buildConfiguration: 'Release'
 
 steps:
+- task: UseDotNet@2
+  inputs:
+    packageType: 'sdk'
+    version: '6.0.100'
+
 - task: NuGetToolInstaller@1
 
 - task: NuGetCommand@2