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Home/ Questions/Q 74373
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Asked: May 10, 20262026-05-10T20:20:53+00:00 2026-05-10T20:20:53+00:00

When I add the textBox.TextChanged to watch list I get a message saying The

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When I add the textBox.TextChanged to watch list I get a message saying

The event 'System.Windows.Forms.Control.TextChanged' can only appear on the left hand side of += or -=

Is there any way to check what event’s are called on text change?

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  1. 2026-05-10T20:20:53+00:00Added an answer on May 10, 2026 at 8:20 pm

    In the debugger, open up the control and find whichever private variable contains the EventHandlerList. Then find the event add/remove code for TextChanged so see which key is used – and examine the event handler list’s entry for that key.

    It’s painful, but it should work.

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