Clipboard.ContainsText behaves differently in .NET8 .NET9 .NET10

[a-solovyev-dx]

.NET version

net8.0-windows
net9.0-windows
net10.0-windows

Did it work in .NET Framework?

Yes

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

net8.0-windows

Issue description

The following code displays "Nothing" in .net9. Both .net8 and .net10 display "Something"

DataObject data = new DataObject();
data.SetData("Something");
Clipboard.SetDataObject(data);

if(Clipboard.ContainsText())
    MessageBox.Show(this, Clipboard.GetText());
else
    MessageBox.Show(this, "Nothing");

.net8

.net9

.net10

Steps to reproduce

WinFormsApp2.zip
You may use this project as a reference

[Zheng-Li01]

@a-solovyev-dx, thanks raised the issue, the issue have been reported than before, and have been resolved, please see details in #12665.
And the fix should also be port in .NET 9.0 but seems there have some wrong things appear, will investigate it,

[Zheng-Li01]

Seems related the issue #12789

[LeafShi1]

The behavioral change in .NET 9.0 originated from PR #10651.

PR #12833 (which updated ContainsText to pass autoConvert: true:

winforms/src/System.Windows.Forms/System/Windows/Forms/OLE/Clipboard.cs

Line 127 in 05b7c2e

return ContainsData(ConvertToDataFormats(format), autoConvert: true);

)
resolved this regression in .NET 10.0, restoring the behavior to match .NET 8.0.

@merriemcgaw @KlausLoeffelmann — should we consider backporting this fix to .NET 9.0 as well?