Callback that occurs at the begining of the provider processing, prior to looping through the attribute set. Overide this to perform work at the beginning of the process if there is some common work that can be performed once rather than repeatedly for each attribute in the loop.

Public Overridable Sub BeginLoad( _
   ByVal attrs As IEnumerable(Of Attribute) _
) 

public virtual void BeginLoad( 
   IEnumerable<Attribute> attrs
)