Convert.ToChar (UInt64) converts 64-bit unsigned integer to Unicode character.
Class Sample Public Shared Sub Main() Dim numbers() As ULong = { UInt64.MinValue,1028, Int64.MaxValue } Dim result As Char For Each number As ULong In numbers Try result = Convert.ToChar(number) Console.WriteLine("{0} converts to '{1}'.", number, result) Catch e As OverflowException Console.WriteLine("{0} is outside the range of the Char data type.", _ number) End Try Next End Sub 'Main End Class 'Sample