Hello,

I have created a simple project in order to show you how to save and load the layout of each XamDataGrid in your tabs. I have used XamTabControl's SelectionChanged event and it's AddedItems and  RemovedItems  collection to access the current grid and the next one, this way when the tab was changed the layout for the grid from current tab will be saved, then the layout for the grid in next tad will be loaded, for example:

private void xamTabControl1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    if (e.RemovedItems.Count != 0 && e.AddedItems.Count != 0)
    {
        XamDataGrid oldGrid = (e.RemovedItems[0] as TabItemEx).Content as XamDataGrid;
        XamDataGrid newGrid = (e.AddedItems[0] as TabItemEx).Content as XamDataGrid;

        if (newGrid != null && newGrid.Tag != null)
        {
            newGrid.Loaded += (ss, ee) =>
            {
                using (FileStream fs = new FileStream("xamDataGridLayout" + newGrid.Name.ToString() + ".xml", FileMode.Open, FileAccess.Read))
                {
                   newGrid.LoadCustomizations(fs);
                }
            };
        }
        using (FileStream fs = new FileStream("xamDataGridLayout" + oldGrid.Name.ToString() + ".xml", FileMode.Create, FileAccess.Write))
        {
            oldGrid.SaveCustomizations(fs);
            oldGrid.Tag = "available";
        }
    }
}

Let me know if you have any questions.

Sincerely,
Zhivko
Associate Software Developer