private void Colour_Drop(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(typeof(string)))
{
string col = e.Data.GetData(typeof(string)).ToString();
Rectangle r = sender as Rectangle;
var y = Grid.GetColumn(r);
var x = Grid.GetRow(r);
vmm.PopulateShapes(x, y, col);
}
}