Why a result of a division is automatically int in C#? -

i have line:

console.writeline((double)(1 / 4))); 

which outputs: 0.

i debugged it, , compiler treating 1 / 4 0:

so understand it, compiler treats 1 / 4 int. why?

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note: when write line:

console.writeline((double)1 / 4)); 

it outputs: 0.25.

because 1 , 4 both ints. there no reason compiler make type-conversions. run sample , see outputs:

int x = 1, y = 4;  console.writeline(x / y);  double xx = 1; console.writeline(xx / y);  double yy = 4; console.writeline(x / yy);