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Home/ Questions/Q 8590881
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Editorial Team
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Editorial Team
Asked: June 11, 20262026-06-11T23:23:49+00:00 2026-06-11T23:23:49+00:00

Why is the messagebox shown before the form closes? SomeForm myForm = new SomeForm();

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Why is the messagebox shown before the form closes?

SomeForm myForm = new SomeForm();
myForm.Show();
MessageBox.Show("Some text");

Do I need to start a new thread, and wait for it to finish? I’ve never come across this problem before.

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  1. Editorial Team
    Editorial Team
    2026-06-11T23:23:50+00:00Added an answer on June 11, 2026 at 11:23 pm

    You need to use Form.ShowDialog() instead. Form.Show shows a modeless window, whereas Form.ShowDialog shows a modal form, i.e., that the user has to close before continuing.

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