PassbyValue vs PassbyReference

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In this article we are going to discuss about Pass by Value and Pass by Reference with examples in C#.

What is the difference between Pass by Value and Pass by Reference Parameters?

Pass by Value - When you pass parameters by value, a copy of the actual value is passed to the method. Changes made to the parameter inside the method do not affect the original value. In this example, the value of a remains 5 after the method call.
```
public void Increment(int number)
{
    number++;
}

static void Main()
{
    int a = 5;
    Increment(a);
    Console.WriteLine(a); //Output:5
}
```
Pass by Reference - When you pass parameters by reference, a reference to the actual memory location of the parameter is passed. Changes made to the parameter inside the method affect the original value. In this example, the value of a is changed to 6 after the method call.
```
public void Increment(ref int number)
{
    number++;
}

static void Main()
{
    int a = 5;
    Increment(ref a);
    Console.WriteLine(a); //Output:6
}
```

Pass by Value
- A copy of the value is passed.
- Changes inside the method do not affect the original variable.
- Memory allocation for the parameter is separate from the original variable.
Pass by Reference
- A reference to the original variable is passed.
- Changes inside the method affect the original variable.
- Both the original variable and the method parameter point to the same memory location.

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