Add usage example to README

Author: nullforce

README.md

@@ -7,3 +7,28 @@ A C# wrapper for Derpibooru JSON models
 **Build**             | TBD
 **NuGet**             | [![nuget](https://img.shields.io/nuget/v/Nullforce.Api.Derpibooru.JsonModels.svg)](https://www.nuget.org/packages/Nullforce.Api.Derpibooru.JsonModels/)
 **NuGet (prerelease)**| [![nuget](https://img.shields.io/nuget/vpre/Nullforce.Api.Derpibooru.JsonModels.svg)](https://www.nuget.org/packages/Nullforce.Api.Derpibooru.JsonModels/)
+
+
+## Usage Example
+
+An example using [Flurl.Http](https://flurl.dev/):
+
+Install the `Nullforce.Api.Derpibooru.JsonModels` package from NuGet (allow prerelease as needed).
+
+```csharp
+using Flurl;
+using Flurl.Http;
+using Nullforce.Api.Derpibooru.JsonModels;
+
+...
+
+var uri = "https://derpibooru.org/search.json";
+uri = uri.SetQueryParam("q", "fluttershy");
+
+var searchResult = await uri.GetJsonAsync<SearchRootJson>();
+```
+
+## See Also
+
+If you're looking for a Derpibooru client written in C# that uses these models,
+see [Nullforce.Api.Derpibooru](https://github.com/nullforce-public/Nullforce.Api.Derpibooru)