Releasing COM Object in C#

I recently encountered an exception in my latest project

System.Runtime.InteropServices.InvalidComObjectException

and I wonder what going on with this exception. In my project we used a OCX as reference then VS2008 created a sort of interop classes we can use those classes in our code. The problem is when we try to exit the application this nasty exception occurs. I put a destructor in my user control class but still it occurs. I think this happens because the object reference was already detached before the app was able to call the destructor. So, what I did is create a function in my use control class

public
void ReleaseCOMObject()

{

            System.Runtime.InteropServices.Marshal.ReleaseComObject(this.m_objCOMobject);

 }

 

and call this function before I call the app exit. See below,

private
void btnExit_Click(object sender, EventArgs e)

{

            m_usercontrolObject.ReleaseCOMObject();

            Application.Exit();

 }

 

I tested it and it works perfectly.

That's it!