Dynamically replace the contents of a C# method?

Question

What I want to do is change how a C# method executes when it is called, so that I can write something like this:

[Distributed]
public DTask Solve         


        

Answer 1

There exists a couple of frameworks that allows you to dynamically change any method at runtime (they use the ICLRProfiling interface mentioned by user152949):

• Prig: Free and Open Source!
• Microsoft Fakes: Commercial, included in Visual Studio Premium and Ultimate but not Community and Professional
• Telerik JustMock: Commercial, a "lite" version is available
• Typemock Isolator: Commercial

There are also a few frameworks that mocks around with the internals of .NET, these are likely more fragile, and probably can't change inlined code, but on the other hand they are fully self-contained and does not require you to use a custom launcher.

• Harmony: MIT licensed. Seems to actually have been used sucessfully in a few game mods, supports both .NET and Mono.
• Deviare In Process Instrumentation Engine: GPLv3 and Commercial. .NET support currently marked as experimental, but on the other hand has the benefit of being commercially backed.