C# fiddle space in Visual Studio

Hey all. I vaguely remember seeing a fiddle space in Visual Studio but I can't remember where. By fiddle space I mean something akin to jsfiddle or codepen.io where I could just mess with C# code without the formality of starting a whole project. If I'm not hallucinating, can someone tell me what that view is called so I can go look up how to get to it?

I know I could just use Linqpad but I like Visual Studio's intellisense.