I am an XNA game developer. I am now starting to develop physics games on XNA but the problem is that I don't know about any physics engine desinged for XNA. Please if you know about it kindly help me.
Thanks in advance :)
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Box2DX is a C# port of Box2D - Erin Catto's 2D Physics Engine. You can find original C++ version on www.box2d.org
This is a very good physics engine, games like angry birds are developed using this. give it a try.
Similar to box 2d and more documented with good examples. http://farseerphysics.codeplex.com/