.NET - C# Features - Pass reference type as parameter

Program.cs

// Reference Type for Demo
public class Person
{
    public int Age { get; set; }
    public string Name { get; set; }

    public override string ToString()
    {
        return $"{{ Age: {Age}, Name: {Name} }}";
    }
}

// ReferenceTypeDemo.cs
public class ReferenceTypeDemo
{
    public void Execute()
    {
        Person p = new Person();
        p.Age = 25;
        p.Name = "Sachin Tendulkar";

        Console.WriteLine("----------------------------------------------------------------");
        Console.WriteLine($"Inside Caller: Before ChangeDetails : Value: {p}");
        ChangeDetails(p);
        Console.WriteLine($"Inside Caller: After ChangeDetails : Value: {p}");
    }

    // Passed object is modified here
    private void ChangeDetails(Person p)
    {
        p.Age = p.Age + 10;
        p.Name = "Rahul Dravid";
        Console.ForegroundColor = ConsoleColor.Green;
        Console.WriteLine($"Inside ChangeDetails: Value: {p}");
        Console.ResetColor();
    }
}

// Driver Class
class Program
{
    static void Main(string[] args)
    {
        ReferenceTypeDemo referenceTypeDemo = new ReferenceTypeDemo();
        referenceTypeDemo.Execute();
    }

}