If I am passing an object to a method, why should I use the ref keyword? Isn't this the default behaviour anyway? For example: class Program { static void Main(string[] args) { Te...

Mar 12, 2009 · The ref keyword signifies that you're passing the actual pointer to the location and updating that pointer in the outside function, so the value in the outside function will change. E.g. the …

Dec 23, 2008 · ref means that the value in the ref parameter is already set, the method can read and modify it. Using the ref keyword is the same as saying that the caller is responsible for initializing the …

May 24, 2022 · 1 Underneath C#/.NET achieves Pass by Object by passing a reference to an object by Value. However, the rules above correctly describe the observable semantics and effects. 2 Unlike …

Apr 25, 2013 · In C#, when you see something referring to a reference type (that is, a type declared with class instead of struct), then you're essentially always dealing with the object through a pointer. In …

But with reference-types, like classes, even without the ref keyword, a reference is passed to the method, not a copy. So what is the use of the ref keyword with reference-types? Take for example:

Is it possible to assign an out / ref parameter using Moq (3.0+)? I've looked at using Callback(), but Action<> does not support ref parameters because it's based on generics. I'd also preferably like to …

bool success = Modify(ref obj); I get "cannot use obj as a ref / out because it is a 'foreach iteration variable". I understand that foreach uses an immutable iterator and that's why this doesn't work. My …

Jun 9, 2009 · Jon Skeet has written an excellent article about parameter passing in C#, which compares and contrasts value types, reference types, passing by value, passing by reference (ref), and output …

out and ref parameters are marshaled differently when dealing with interop code Also, as an aside, it's important to note that while reference types and value types differ in the nature of their value, every …