Getting Cross-thread operation not valid in MDIParent [duplicate]

Question

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Closed 6 years ago.

Possible Duplicate:
Cross-thread operation not valid

I am trying to close the base of a form from another thread. I am getting the following error.

System.InvalidOperationException: Cross-thread operation not valid: Control 'MDIParent' accessed from a thread other than the thread it was created on.

for the below line:

MDIParent.MDIParentRef.BaseClose();

Answer 1

You need to perform the operation on the UI Thread:

if (InvokeRequired) 
    Invoke(new Action(MDIParent.MDIParentRef.BaseClose));
else
    MDIParent.MDIParentRef.BaseClose();