C# - Inconsistent math operation result on 32-bit and 64-bit

Posted by david.healed on Stack Overflow See other posts from Stack Overflow or by david.healed
Published on 2010-03-17T10:09:19Z Indexed on 2010/03/17 10:11 UTC
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Consider the following code:

double v1 = double.MaxValue;
double r = Math.Sqrt(v1 * v1);

r = double.MaxValue on 32-bit machine r = Infinity on 64-bit machine

We develop on 32-bit machine and thus unaware of the problem until notified by customer. Why such inconsistency happens? How to prevent this from happening?

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