How to paste the copied row in AddNewRow in WPF DataGrid (SfDataGrid)?

<syncfusion:SfDataGrid x:Name="sfdatagrid"
                               AddNewRowPosition="Top"
                               AllowEditing="True"
                               AutoGenerateColumns="True"
                               GridCopyOption="CopyData"
                               ItemsSource="{Binding EmployeeDetails}"
                               SelectionMode="Extended"
                               SelectionUnit="Row" />

this.sfdatagrid.GridCopyPaste = new CustomPaste(sfdatagrid);
…
public class CustomPaste : GridCutCopyPaste
{
    public CustomPaste(SfDataGrid sfgrid)
        : base(sfgrid)
    {
 
    }
 
    protected override void PasteTextToRow()
    {
        IDataObject dataObject = null;
        dataObject = Clipboard.GetDataObject();
        var clipBoardContent = dataObject.GetData(DataFormats.UnicodeText) as string;
        string[] records = Regex.Split(clipBoardContent.ToString(), @"\r\n");
        if (dataGrid.SelectionUnit == GridSelectionUnit.Row)
        {
            dataGrid.Focus();
            bool isAddNewRow= this.dataGrid.IsAddNewIndex(this.dataGrid.SelectionController.CurrentCellManager.CurrentRowColumnIndex.RowIndex);
               
            //Checking for row is AddNewRow.
            if (isAddNewRow)
            {
                if (!this.dataGrid.View.IsAddingNew)
                    return;
                                      
                string[] record = Regex.Split(records[0], @"\t");
                var provider = this.dataGrid.View.GetPropertyAccessProvider();                  
                var rowData = (this.dataGrid.View as CollectionViewAdv).CurrentAddItem;
 
                //Paste the copied row in each cell.
                foreach (var column in this.dataGrid.Columns)
                {                       
                    var cellText = provider.GetValue(rowData, column.MappingName);
                    if (cellText == null)
                    {
                        PropertyDescriptorCollection typeInfos = this.dataGrid.View.GetItemProperties();
                        var typeInfo = typeInfos.GetPropertyDescriptor(column.MappingName);                          
                    }
                    CommitValue(rowData, column, provider, record[this.dataGrid.Columns.IndexOf(column)]);
                }
            }
        }
        else
            base.PasteTextToRow();
    }
}