Why is the original object changed after a copy, without using ref arguments?

Question

At work we were encountering a problem where the original object was changed after we send a copy through a method. We did find a workaround by using IClonable

Answer 1

that's normal since your MyClass is a reference type so you are passing a reference to original data not the data itself this why it's an expected behavior here is an explanation of what a reference type is from Parameter passing in C#

A reference type is a type which has as its value a reference to the appropriate data rather than the data itself