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Mike_Thompson_9's avatar
Mike_Thompson_9
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Aug 08, 2007

CommonULong64 OverflowException

I am trying to convert the CommonULong64 type to UInt64 in .NET for a CommonStatistic type. Sometimes this works fine and I get a good number back. Other times I get a System.OverflowException. The...
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Mike_Thompson_9's avatar
Mike_Thompson_9
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Aug 09, 2007
There appears to be a problem with the large negative number on the [value.low]. From doing some research, the best method is to turn the negative number in to a positive number, then do the calculation. From what I can tell, this works:


Public Shared Function Build64(ByVal value As Object) As UInt64
        Return Convert.ToUInt64((Convert.ToUInt64(value.high) << 32) Or Convert.ToUInt64(Math.Abs(value.low)))
End Function

I am getting a good number back, but I am not 100% sure it is correct. However the exception is gone. Your thoughts?