Declarations vs definitions

Question

In C# how does a declaration differ from a definition, i.e.:

1. A class declaration vs a class definition
2. A variable declaration vs definition
3. A met

Answer 1

1. That distinction does not exist. You are referring to the scope of a declaration, the point of definition is irrelevant to the scope of the variable/field.

2. int x;  // 'x' is declared
   x = 10; // 'x' is assigned
   
   
   int y = 20; // 'y' is both declared and assigned
   

3. That doesn't make a lot of sense. A method argument is declared in the method signature.

I think you are a bit confused regarding terminology in 1 and 3.