Elegantly determine if more than one boolean is “true”

Question

I have a set of five boolean values. If more than one of these are true I want to excecute a particular function. What is the most elegant way you can think of that would al

Answer 1

I was recently having this same issue, where I had three boolean values, which I needed to check that only 1 of them was true at a time. For this I used the xor operator as follows:

bool a = true;
bool b = true;
bool c = false;

if (a || b || c)
{
    if (a ^ b ^ c){
        //Throw Error
    }
}

This code will throw an error as a and b are both true.

For reference: http://www.dotnetperls.com/xor

I have only just found the xor operator in C# if anyone knows of any pit falls of this strategy, please let me know.