ISynchronizeInvoke.InvokeRequired Property

Definition

Gets a value indicating whether the caller must call Invoke(Delegate, Object[]) when calling an object that implements this interface.

C#
public bool InvokeRequired { get; }

Property Value

true if the caller must call Invoke(Delegate, Object[]); otherwise, false.

Remarks

This property determines whether the caller must call Invoke when making method calls to an object that implements this interface. Such objects are bound to a specific thread and are not thread-safe. If you are calling a method from a different thread, you must use the Invoke method to marshal the call to the proper thread.

Applies to

Product Versions
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1