c# - What's the difference between "call" and "invoke"?

Question

I'm currently reading a book by Daniel M. Solis called "Illustrated C# 2010." The book says:

"When a method is called or invoked ..."

What is the difference between these two terms?

Answer 1

Function calling is when you call a function yourself in a program. While function invoking is when it gets called automatically.

For example, consider this program:

struct s
{
  int a,b,s;

  s()
  {
    a=2;
    b=3;
  }

  void sum()
  {
    s=a+b;
  }
};

void main()
{
  struct s obj; //line 1
  obj.sum(); // line 2
}

Here, when line 1 is executed, the function (constructor, i.e. s) is invoked. When line 2 is executed, the function sum is called.

source: web