Object passed as parameter to another class, by value or reference?

Question

In C#, I know that by default, any parameters passed into a function would be by copy, that\'s, within the function, there is a local copy of the parameter. But, what about when

Answer 1

Assuming someTestObj is a class and not a struct, the object is passed by reference, which means that both obj and someTestObj refer to the same object. E.g. changing name in one will change it in the other. However, unlike if you passed it using the ref keyword, setting obj = somethingElse will not change someTestObj.