C# Reference and Value-types

/*Reference: Passing the original object that can be changed
Value: Passing a value is like copying it, the initial value stays untouched

Related keywords:
ref
- used to pass a reference
- May be modified by the called method
out
- used to pass a reference
- Must be modified by the called method
in
- used to pass a reference
- Can't be modified by the called method

*/



    class Reference //classes are by default reference types
    {
        public int property { get; set; }
    }

    struct Value //structs are by default value types
    {
        public int property { get; set; }
    }

    class App
    {
        public static void Main()
        {
            int apples = 8;
            int bananas = 15;

            DoStuff(apples, ref bananas);
            Console.WriteLine($"apples: {apples}\nbananas: {bananas}\n");
            //Output: apples: 8, bananas: 6969

            Reference myClass = new Reference();
            Value myStruct = new Value();

            myClass.property = 99;
            myStruct.property = 77;

            DoOtherStuff(myClass, myStruct);
            Console.WriteLine($"Class: {myClass.property}\nStruct: {myStruct.property}");
            //Output: Class: 420, Struct: 77
        }

        public static void DoStuff(int value, ref int reference)
        {
            value = 69;
            reference = 6969;
        }

        public static void DoOtherStuff(Reference aClass, Value aStruct)
        {
            aClass.property = 420;
            aStruct.property = 1337;
        }
    }