How to determine what version of asp.net MVC is being used by an existing mvc application

There are 2 ways to do this

1. At design time - In the solution explorer, expand "References" folder. Right click on System.Web.Mvc assembly and select "Properties" and you can find the version that's used as shown below.

 

2. At runtime using code - typeof(Controller).Assembly.GetName().Version.ToString(); 

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