Arithmetic operation resulted in an overflow. (Adding integers)

Question

I can't understand this error:

In this call to method SetVolume, Volume = 2055786000 and size = 93552000. Volume is an Integer property, and size is also Integer, as you can see.

The class is a partial class of a dbml entity class, however this Volume property is NOT a column in the database, it exist only in the partial class, as a "business object property".

View Detail shows:

Data > Item : In order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user.

What may cause this...?

Answer 1

The maximum value of an integer (which is signed) is 2147483647. If that value overflows, an exception is thrown to prevent unexpected behavior of your program.

If that exception wouldn't be thrown, you'd have a value of -2145629296 for your Volume, which is most probably not wanted.

Solution: Use an Int64 for your volume. With a max value of 9223372036854775807, you're probably more on the safe side.