C# 'this' using help pls

Question

I have no idea what happens there, if could you explain me what is this code doing step by step it would be nice.

Input give us 2 values type of double, and i think this line:
Avg avg = new Avg(num1, num2);
is meaning that we pass num1 and num2 to the Avg class by constructor and 'this.' is assigning them to the declared variables inside class ?

class Program
{
static void Main(string[] args)
{
double num1 = Convert.ToDouble(Console.ReadLine());
double num2 = Convert.ToDouble(Console.ReadLine());

Avg avg = new Avg(num1, num2);

Console.WriteLine(avg.GetAvg());
}
}

class Avg
{
double num1;
double num2;

//create the constructor
public Avg(double num1,double num2 )
{
this.num1 = num1;
this.num2 = num2;
}

public double GetAvg()
{
return (num1 + num2)/2;
}
}
}

Answer 1

Here you see basics of objects oriented programming oop. With new will be an object created / initiated. After that called its method for getting the average of two input nunbers.