Determines the number of pk fields for the set of PK fields passed in. Normally this is the # of entries in the PK field collection, however in the case of a subtype of a targetperentity, all PK fields of the supertypes are also present in this collection and therefore this routine has to determine how many of these fields are really there.

public static int DetermineNumberOfPkFields(
	IList pkFields
)

Public Shared Function DetermineNumberOfPkFields ( 
	pkFields As IList
) As Integer