CheckForIllegalCrossThreadCalls Property
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Control.CheckForIllegalCrossThreadCalls Property


Gets or sets a value indicating whether to catch calls on the wrong thread that access a control's Handle property when an application is being debugged.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public static bool CheckForIllegalCrossThreadCalls { get; set; }

Property Value

Type: System.Boolean

true if calls on the wrong thread are caught; otherwise, false.

When a thread other than the creating thread of a control tries to access one of that control's methods or properties, it often leads to unpredictable results. A common invalid thread activity is a call on the wrong thread that accesses the control's Handle property. Set CheckForIllegalCrossThreadCalls to true to find and diagnose this thread activity more easily while debugging.

.NET Framework
Available since 2.0
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