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A sample demonstrating how to create a GraphQL Backend in .NET and consume it from a .NET mobile app created using Xamarin
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LICENSE Update to .NET Standard 2.1 & .NET Core 3.0 Dec 1, 2019

.Net GraphQL

If you're new to GraphQL, check out these videos featured in the Learn More section, below

To run this sample, follow the Getting Started Instructions, below.

This app was featured at GraphQL Summit 2019.

GraphQL Backend

The GraphQL backend is created in C# using the GraphQL NuGet Package.



The mobile app is created in C# using Xamarin and the GraphQL.Client NuGet Package.

Xamarin.iOS Xamarin.Android

Getting Started

This app requires us to run the GraphQL API using the terminal while using Visual Studio to build/deploy the Xamarin.iOS and/or Xamarin.Android app.

1. Run the GraphQL API

  1. Open the terminal
  2. In the terminal, clone this solution by entering the following command:
    • Note: If you have already downloaded the solution, skip this step
git clone
  1. In the terminal, navigate to the DotNetGraphQL.API folder by entering the following command:
  • On Windows
cd [path to DotNetGraphQL folder]\Source\DotNetGraphQL.API\
  • On macOS
cd [path to DotNetGraphQL folder]/Source/DotNetGraphQL.API/
  1. In the terminal, run DotNetGraphQL.API.csproj by entering the following command:
dotnet run
  1. Open a web browser
  2. In the web browser, navgiate to http://localhost:4000
  3. Confirm GraphiQL

2. Run the Xamarin.Android App

  1. In Visual Studio, open DotNetGraphQL/Source/DotNetGraphQL.sln
  2. In Visual Studio, in the Solution Explorer, right-click on DotNetGraphQL.Android
  3. In the right-click menu, select Set as Startup Project
  4. In Visual Studio, build/deploy DotNetGraphQL.Android to an Android device
  5. Confirm the list of dogs from the GraphQL API appears

Learn More

Learn more about Xamarin + GraphQL


Xamarin Resources

GraphQL Resources

Video Recordings

Consuming GraphQL in C#

This session on GraphQL + C# was delivered at GraphQL Summit 2019. It demonstrates how to create a GraphQL Backend in C# and connect it to a client-side mobile app written in C# using Xamarin.

Consuming GraphQL in C#

Xamarin + GraphQL

The session on Xamarin + GraphQL was delivered at Xamarin Developer Summit 2019. It demonstrates how to create a Xamarin app in C# and connect it to an existing GraphQL Backend.

Xamarin + GraphQL Video

Learning GraphQL Series

This special series teaches the basics of GraphQL, how to interact with an existing GraphQL endpoint, how to create your first GraphQL Server, and how to deploy your GraphQL Server to the cloud using Azure!

Learning GraphQL Series

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