When debugging, MonoDevelop cannot resolve some UnityEngine types in watch/immediate windows

When debugging a project in MonoDevelop it seems that the debugger is unable to resolve some types from UnityEngine namespace. For example, when evaluating expression typeof(GameObject) the result is "Unknown type: UnityEngine.GameObject". Note that debugger sees that GameObject belongs to UnityEngine, yet still returns error.

When typing UnityEngine and then pressing . (dot), intellisense does not display all UnityEngine members. Some of them, GameObject among them, are missing. But, assuming the current script is attached to a GameObject, then typing this.gameObject.#### (where #### can be any GameObject property), somehow refreshes the debugger, making the type visible. It is now accessible via intellisense and typeof(GameObject) no longer returns error.

To reproduce it, just create new empty project, create a cube, create a C# script and attach it to the cube. Put breakpoint inside Start method, attach to Unity Editor process and start the project. After breakpoint is hit, in the immediate window type:

 > typeof(GameObject)
 Unknown type: UnityEngine.GameObject
 > this.gameObject.active
 true
 > typeof(GameObject)
 {UnityEngine.GameObject}
 > 

Is it possible to prevent such behavior and be able to see all referenced types?

I'm observing this in Unity free 4.1.5f1 and bundled MonoDevelop 2.8.2. Clean install on Win 7 and 8, both x64.