Modifying routing table using .NET (C#)

Is there any way to modify routing tables using the .NET framework? Or do I have to use P/Invoke with Windows API? In that case, which APIs would be most helpful? Can someone point me in the right direction here?

If you have a code example in C# I'd be most grateful!开发者_JAVA技巧

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You can do it with P/Invoke. The best example I can find on this is here.