Public Function GetPropertyValue( _
   ByVal defValue As String, _
   ByVal propValue As String, _
   ByVal webConfigKey As String _
) As String

Dim instance As WebFlyPostBackManager
Dim defValue As String
Dim propValue As String
Dim webConfigKey As String
Dim value As String
 
value = instance.GetPropertyValue(defValue, propValue, webConfigKey)

public string GetPropertyValue( 
   string defValue,
   string propValue,
   string webConfigKey
)