.NET version

.NET 9.0 SDK build: 9.0.100-preview.2.24116.21

Did it work in .NET Framework?

Yes

Did it work in any of the earlier releases of .NET Core or .NET 5+?

Yes, cannot repro previous version: .NET 8.0 SDK build

Issue description

When setting PrintDialog's UseEXDialog is false and clicking Cancel button for this dialog, the value of DialogResult is OK, not Cancel.

.NET 9.0 Result:

.Net 8.0 Result:

Steps to reproduce

1. Create a Winforms application with a button, textBox and a PrintDialog
2. Double-click button and add following code:

private void button1_Click(object sender, EventArgs e)
{
    DialogResult result;

    printDialog1.UseEXDialog = false;
    result = printDialog1.ShowDialog();
    
    textBox1.Text = result.ToString();  
}

or use this sample application:
PrintDialogSample.zip