Need to find a control in your ASP.net page without knowing where and how deep within containing controls it is buried. Using .Net 3.5 features such as LINQ and Extension Methods its cake! Here is the method:
public static IEnumerable All(this ControlCollection controls)
{
foreach(Control control in controls)
{
foreach(Control grandchild in control.Controls.All())
yield return grandchild;
yield return control;
}
}
MemoryTin 
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