We are aware of this problem and it is logged for fixing. To workaround is put the code in a function:
public void MyFunction()
{
foreach (GridDataItem item in RadGrid.Items)
{
if (item.Selected==false)
{
item.Visible = false;
}
}
}
If you experience any other problems with the converter, please, post them to the Code Converter Ideas & Feedback Portal so that everyone can vote and the bug items can be prioritized.