Convert.ToByte (String, Int32) converts string in a specified base to 8-bit unsigned integer.
Class Sample Public Shared Sub Main() Dim value As String = SByte.MinValue.ToString("X") Try Dim number As Byte = Convert.ToByte(value, 16) Console.WriteLine("0x{0} converts to {1}.", value, number) Catch e As OverflowException Console.WriteLine("Unable to convert '0x{0}' to a byte.", value) End Try End Sub End Class