How do I create a parity bool from a range of bools?

Question

In c you have the possibility to add up your bools and then mod the result with 2, but in the stricter typed language c# you have to add a lot of typecasts to do the same. I hope there is some more esthetical way of doing this?

c sourcecode:
int array_out[12];
...
array_out[11] = (array_out[0] + array_out[1] + array_out[2] + array_out[3] + array_out[4] + array_out[5] + array_out[6] + array_out[7] + array_out[8] + array_out[9] + array_out[10]) % 2;

c# equivalent:
bool[] array_out= new bool[12];
...
array_out[11] = (((array_out[0] ? 1 : 0) + (array_out[1] ? 1 : 0) + (array_out[2] ? 1 : 0) + (array_out[3] ? 1 : 0) + (array_out[4] ? 1 : 0) + (array_out[5] ? 1 : 0) + (array_out[6] ? 1 : 0) + (array_out[7] ? 1 : 0) + (array_out[8] ? 1 : 0) + (array_out[9] ? 1 : 0) + (array_out[10] ? 1 : 0)) % 2) == 1;