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We are not forced to fill the returned value from e.g. a method call into a declared variable of expected type, but what happens to it in that situation?
Where does the following returned value go/What happens to it: ?
decimal d = 5.5m;
Math.Round(d, MidpointRounding.AwayFromZero);
Obviously, if I wanted to see the result from the method call I would do the following:
decimal d = 5.5m;
decimal d2 = Math.Round(d, MidpointRounding.AwayFromZero); // Returns 6 into
// the variable "d2"
(This question is NOT specific to value types, but also reference types)
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It doesn't go anywhere. The value / reference is simply discarded. It is as if you assigned it to a local variable that immediately goes out of scope.
The return statement ends function execution and specifies a value to be returned to the function caller.
A return statement ends the execution of a function, and returns control to the calling function. Execution resumes in the calling function at the point immediately following the call. A return statement can return a value to the calling function.
Any method declared void doesn't return a value. It does not need to contain a return statement, but it may do so.
It gets popped from the execution stack:
IL_000A: call System.Math.Round
IL_000F: pop
If it's a reference type, the reference will be popped from the stack, and the object itself will eventually be collected by the GC (assuming that it has no other references).
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