Force an application to run under specific .NET runtime version?

Question

I have .NET 2.0 runtime installed, then I installed the .NET 4.0 runtime, so I have both. When I run a .NET app, is there a way to force which runtime will be used?

Answer 1

Here's a list of MSDN reference to target specific .NET Framework version for VS.NET projects:

How to: Target a Specific .NET Framework

Visual Studio 2010
How to: Target a Specific .NET Framework Version or Profile