Convert.ToInt16 (UInt64) converts 64-bit unsigned integer to 16-bit signed integer.
Module Example Public Sub Main() Dim numbers() As ULong = { UInt64.MinValue, 121, 340, UInt64.MaxValue } Dim result As Short For Each number As ULong In numbers Try result = Convert.ToInt16(number) Console.WriteLine(result) Catch e As OverflowException Console.WriteLine("OverflowException") End Try Next End Sub End Module