private void DataGrid_SizeChanged(object sender, SizeChangedEventArgs e)
        {
            if (ColumnsList != null && ColumnsList.Count > 0)
            {
                totalWidth = ColumnsList.Sum(x => x.Width);
                currentWidth = ColumnsList.Where(i => i.Visibility.Equals(true)).Sum(x => x.Width);
            }
            if (nextInlineColumn != null && nextInlineColumn.Width > 0)
                if ((currentWidth + nextInlineColumn.Width) <= DataGridExpander.ActualWidth)
                {
                    ColumnsList[ColumnsList.LastIndexOf(nextInlineColumn)].Visibility = true;
                    FindCurrentAndNextColumn();
                }
                else if (currentWidth > ActualWidth)
                {
                    ColumnsList[ColumnsList.LastIndexOf(currentVisibleColumn)].Visibility = false;
                    FindCurrentAndNextColumn();
                }
            currentWidth = DataGridExpander.ActualWidth;
            GenerateGridColumns();

        }