Add NuGet push

WireMock.Net Solution.sln

@@ -9,6 +9,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 	ProjectSection(SolutionItems) = preProject
 		.runsettings = .runsettings
 		azure-pipelines-linux.yml = azure-pipelines-linux.yml
+		azure-pipelines-nuget.yml = azure-pipelines-nuget.yml
 		azure-pipelines.yml = azure-pipelines.yml
 		build-info.md = build-info.md
 		CHANGELOG.md = CHANGELOG.md

azure-pipelines-nuget.yml

@@ -0,0 +1,46 @@
+pool:
+  vmImage: 'vs2017-win2016'
+
+variables:
+  Prerelease: 'ci'
+  buildId: "1$(Build.BuildId)"
+  buildProjects: '**/src/**/*.csproj'
+
+steps:
+# Print buildId
+- script: |
+    echo "BuildId = $(buildId)"
+  displayName: 'Print buildId'
+
+# Based on https://whereslou.com/2018/09/versioning-and-publishing-nuget-packages-automatically-using-azure-devops-pipelines/
+- task: DotNetCoreCLI@2
+  displayName: Build Release
+  inputs:
+    command: 'build'
+    arguments: /p:Configuration=Release # https://github.com/MicrosoftDocs/vsts-docs/issues/1976
+    projects: $(buildProjects)
+
+- task: DotNetCoreCLI@2
+  displayName: Pack
+  condition: and(succeeded(), ne(variables['Build.Reason'], 'PullRequest')) # Do not run for PullRequests
+  inputs:
+    command: pack
+    configuration: 'Release'
+    packagesToPack: $(buildProjects)
+    nobuild: true
+    packDirectory: '$(Build.ArtifactStagingDirectory)/packages'
+    verbosityPack: 'normal'
+
+- task: PublishBuildArtifacts@1
+  displayName: Publish Artifacts
+  condition: and(succeeded(), ne(variables['Build.Reason'], 'PullRequest')) # Do not run for PullRequests
+  inputs:
+    PathtoPublish: '$(Build.ArtifactStagingDirectory)'
+
+- task: DotNetCoreCLI@2
+  displayName: Push to NuGet
+  condition: and(succeeded(), ne(variables['Build.Reason'], 'PullRequest')) # Do not run for PullRequests
+  inputs:
+    command: custom
+    custom: nuget
+    arguments: push $(Build.ArtifactStagingDirectory)\packages\*.nupkg --source https://api.nuget.org/v3/index.json --nuget-api-key $(NuGetKey) --skip-duplicate