Difference between "protected" and "virtual/override"

Question

I couldn't understand the need or purpose of "protected" when i have "virtual/override" could someone explain me what do i need those 2 things if they are almost the same.

Edit:

Thanks for all the helpers, i now understand that "protected" is only for visibility purposes, while virtual/override is for class behavior.

Answer 1

• protected means private for current class and derived classes
• virtual means it can be used as-is but also be overridden in derived classes

Maybe it is better with some code instead of things you have probably already read, here is a little sample you can play with. Try removing the comments (//) and you can see that the compiler tells you that the properties cannot be accessed

[TestFixture]
public class NewTest
{
    [Test]
    public void WhatGetsPrinted()
    {
        A a= new B();
        a.Print();  //This uses B's Print method since it overrides A's
        // a.ProtectedProperty is not accesible here
    }
}

public class A
{
    protected string ProtectedProperty { get; set; }

    private string PrivateProperty { get; set; }

    public virtual void Print()
    {
        Console.WriteLine("A");
    }
}

public class B : A
{
    public override void  Print() // Since Print is marked virtual in the base class we can override it here
    {
        //base.PrivateProperty can not be accessed hhere since it is private
        base.ProtectedProperty = "ProtectedProperty can be accessed here since it is protected and B:A";
        Console.WriteLine("B");
    }
}