LINQPad

LINQPad is a software utility targeted at .NET Framework and .NET Core development. It is used to interactively query SQL databases (among other data sources such as OData or WCF Data Services) using LINQ, as well as interactively writing C# code without the need for an IDE. This expands its use to a general "test workbench" where C# code can be quickly prototyped outside of Visual Studio.