Unions

Let's suppose that we have the following schema:

schema {
  query: Query
}

type TextContent {
  text: String!
}

type ImageContent {
  imageUrl: String!
  height: Int!
}

union PostContent = TextContent | ImageContent

type Query {
  posts: [PostContent!]!
}

Here how we can get posts:

 var response = await qlClient.Query(static q => q
        .Posts(
            o => new
            {
                Image = o.On<ImageContent>().Select(oo => new
                {
                    oo.ImageUrl,
                    oo.Height
                }),
                Text = o.On<TextContent>().Select(oo => new
                {
                    oo.Text
                }),
            }));

Console.WriteLine(JsonSerializer.Serialize(response));
// {
//   "Query": "query { posts { ... on ImageContent { imageUrl height } ... on TextContent { text } __typename } }",
//   "Data": [
//     {
//       "Image": {
//         "ImageUrl": "http://example.com/image.png",
//         "Height": 1920
//       }
//     },
//     {
//       "Text": {
//         "Text": "Hello World!"
//       }
//     }
//   ]
// }