How to disable the contextmenu for a specific row in WinForms GridGroupingControl?

//Event Subscription
 this.gridGroupingControl1.TableControl.MouseDown += TableControl_MouseDown;
 
//Event Customization
 private void TableControl_MouseDown(object sender, MouseEventArgs e)
 {
    if (e.Button == MouseButtons.Right)
    {
        int rowIndex, colIndex;
        this.gridGroupingControl1.TableControl.PointToRowCol(e.Location, out rowIndex, out colIndex);
        //To get the current cell style.
        GridTableCellStyleInfo style = this.gridGroupingControl1.TableControl.GetTableViewStyleInfo(rowIndex, colIndex);
        //To get the record.
        Record record = style.TableCellIdentity.DisplayElement.GetRecord();
        if(record != null)
        {
            bool value;
            string boolValue = record.GetValue("Boolean").ToString();
            if (bool.TryParse(boolValue, out value) && value)
                this.gridGroupingControl1.ContextMenu = null;
           else if (this.gridGroupingControl1.ContextMenu == null)
                this.gridGroupingControl1.ContextMenu = menu;
        }
        else
        {
            //To avoid the contextmenu for header row.
            this.gridGroupingControl1.ContextMenu = null;
        }
    }
}

'Event Subscription
AddHandler Me.gridGroupingControl1.TableControl.MouseDown, AddressOf TableControl_MouseDown
 
'Event Customization
Private Sub TableControl_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
   If e.Button = MouseButtons.Right Then
       Dim rowIndex, colIndex As Integer
       Me.gridGroupingControl1.TableControl.PointToRowCol(e.Location, rowIndex, colIndex)
       'To get the current cell style.
       Dim style As GridTableCellStyleInfo = Me.gridGroupingControl1.TableControl.GetTableViewStyleInfo(rowIndex, colIndex)
       'To get the record.
       Dim record As Record = style.TableCellIdentity.DisplayElement.GetRecord()
       If record IsNot Nothing Then
          Dim value As Boolean
          Dim boolValue As String = record.GetValue("Boolean").ToString()
          If Boolean.TryParse(boolValue, value) AndAlso value Then
  Me.gridGroupingControl1.ContextMenu = Nothing
          ElseIf Me.gridGroupingControl1.ContextMenu Is Nothing Then
   Me.gridGroupingControl1.ContextMenu = menu_Renamed
          End If
          Else
  'To avoid the contextmenu for header row.
  Me.gridGroupingControl1.ContextMenu = Nothing
          End If
       End If
End Sub