Convert.ToUInt64 (Int64) converts 64-bit signed integer to 64-bit unsigned integer.
Class Sample
Public Shared Sub Main()
Dim numbers() As Long = { Int64.MinValue, -19432, -18, 0, 121, 340, Int64.MaxValue }
Dim result As ULong
For Each number As Long In numbers
Try
result = Convert.ToUInt64(number)
Console.WriteLine(result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
number.GetType().Name, number)
End Try
Next
End Sub
End Class
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