Building GraphQL APIs in C#

The document discusses GraphQL, a query language for APIs. It notes that GraphQL APIs are self-documenting as users can explore them using GraphiQL. It also mentions that GraphQL requests use a JSON body containing a "query" field with the GraphQL query string. The document also lists some key information about GraphQL-DotNet, an open source .NET implementation of GraphQL with over 140 contributors and 7.5 million NuGet downloads.