Escape button to close Windows Forms form in C#

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This will always work, regardless of proper event handler assignment, KeyPreview, CancelButton, etc:

protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
    if (keyData == Keys.Escape) {
        this.Close();
        return true;
    }
    return base.ProcessCmdKey(ref msg, keyData);
}

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