why my unity3d software can't connect with monodevelop?

• Are you trying to open $$anonymous$$onoDevelop from Unity editor?

• Is this the $$anonymous$$onoDevelop that comes with Unity or a different install by you? In the latter case it doesn't have the Unity plugins. The version that comes with Unity does have them.

• If you're opening the project by hand, try to open the .sln because that's the highest level file.

Have you tried re-installing Unity?

@youngo,

Please don't post the same question multiple times.