What does => operator pointing from field or a method mean? C# [duplicate]

Answer 1

It's a new shorthand syntax in C# 6.

In your first example it's defining a public method, Calculate(int x) whose implementation is defined within DoSomething(x).

An equivalent definition would be:

class SomeClass {

    public int Calculate(int x) { return DoSomething(x); }

    protected int DoSomething(int x) { ... }
}