protective cases

System.ArgumentOutOfRangeException: Non-negative number required. Parameter name: count at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) at System.Collections.Generic.List`1.RemoveRange(Int32 index, Int32 count) at client_catalog.Render() in \\filer7\u79\vws30414\public_html\App_Code\client_catalog.vb:line 45