Expand C# propertygrid on show

Question

i have a question about property grid. when the form is shown i would like a group to be expand rather then collapsed. i have search a lot for that on the web and could not

Answer 1

(Re-mixing Simon's answer above and Eric's answer below...)

To expand all of the siblings of the SelectedGridItem:

public static void ExpandItemWithInitialExpandedAttribute(this PropertyGrid propertyGrid)
{
     foreach (GridItem item in propertyGrid.SelectedGridItem.Parent.GridItems)
     {
         ExpandItemWithInitialExpandedAttribute(propertyGrid, item);
     }
}