Visual Studio 2010 and Visual C# Express 2010 are measure Integrated Development Environments (IDE) that contain tools that aids you in developing C# and .NET applications. you can create a C# application simply by employing a notwpad or any text editor to kind your codes. you can then use the C# compiler obtainable after you install .NET. However that may be a tedious method and errors would be arduous to sight. Note that i could use the term Visual Studio to visit each Visual Studio and Visual C# Express product.