class SomeClass {
	public static int s;
	public int d;
}

SomeClass.s = 42

SomeClass.d = 42

new SomeClass().s = 42

new SomeClass().d = 42

var obj1 = new SomeClass();
var obj2 = new SomeClass();
obj1.d = 42;
obj2.d = 43;
Console.Write(obj1.d + " " + obj2.d);