Hi,may be you can try like this
Arun you can decalre a property and assign the height value to this property and then throgh code behind bind it to the height of label 1
private string height;
public string Height>
{
get { return height; }
set { height = value; }
}
if (label2.visibilty== coolapse)
{
Height= 150;
}
and in xaml
<Label Background="Brown" height={Binding Height} Content="mylabel1" Grid.Column="0" Grid.Row="0"></Label>