The .NET Framework allows you to install multiple versions of the common language runtime on the same computer. By default, when the .NET Framework is installed on a computer where the runtime is already installed, all ASP.NET applications are automatically updated to use that version of the .NET Framework. Although later versions of the .NET Framework are designed to be backward compatible, you m
![ASP.NET Side-by-Side Overview](https://cdn-ak-scissors.b.st-hatena.com/image/square/d6e4cb632c7025e9f5e05fd314fbf6dcd6144e8d/height=288;version=1;width=512/https%3A%2F%2Flearn.microsoft.com%2Fen-us%2Fmedia%2Fopen-graph-image.png)