syntactic sugar for checking equality with multiple value

Question

I would like to compare 2 equations, lets say 2*2 and 2+2 to a single answer, 4, using Visual Studio 2015, e.g.

if (4 == (2*2 && 2+2)) {...}

but it returns an error, "Operator '&&' cannot be applied to operands of type 'int' and 'int'". The only other way I could think of writing the code is:

if (4 == 2*2 && 4 == 2+2) {...}

which would work, but gets very repetitive when a lot of values are to be compared. Is there a easier way to achieve this?

Answer 1

var results = new[]{ 2 + 2, 2 * 2, ... };
if (results.All(r => r == 4)) {
    ...
}

This gathers the results of all operations in the collection results, and uses the extension method All to verify that the specified predicate holds for all values; allowing to write the predicate only once.