There are better checks. I'm generally not a fan of Microsoft, but the SafeInt library ( https://safeint.codeplex.com/ https://safeint.codeplex.com/ ) does tho

There are better checks. I'm generally not a fan of Microsoft, but the SafeInt library ( https://safeint.codeplex.com/ https://safeint.codeplex.com/ ) does those kinds of checks in sofware. I don't remember where I read it, but regarding multiplication: if you multiply two N-bit numbers together, the result will always fit in a 2N-bit number. For instance, the product of two 16 bit numbers will fit in 32 bits, the product of two 32 bit numbers will fit in 64 bits, etc. You can assign the product to an integer able to hold the larger size and then check if it would also fit in an integer of the smaller size.