Convert.ToSByte (UInt32) converts 32-bit unsigned integer to 8-bit signed integer.
Class Sample Public Shared Sub Main() Dim numbers() As UInteger = { UInt32.MinValue, 121, 340, UInt32.MaxValue } Dim result As SByte For Each number As UInteger In numbers Try result = Convert.ToSByte(number) Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result) Catch e As OverflowException Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _ number.GetType().Name, number) End Try Next End Sub End Class