InvalidOperationException: This operation cannot be performed while an auto-filled column is being resized

Question

I have a form with a DataGridView and I want to set the columns AutoSizeMode to Fill and the grids ColumnHeadersHeightSizeMode

Answer 1

In .net core (3.1.9) and .net5.0 this is not reproducible. There was no directly fix, but somehow there are no exception any more. See (and post if you still have this issue): https://github.com/dotnet/winforms/issues/1830.