System. Object Class Methods Using C# with Example

 using System;

namespace CSharpInheritance
{
	class MyData
	{
		private double D1; 
		private double D2;
		private double D3;

		public MyData(){}
		public MyData(double d1, double d2, double d3) 
		{
			D1 = d1; D2 = d2; D3 = d3;
		}

		public double Sum()
		{
			return D1 + D2 + D3;
		}
	}
	
	class Program
	{
		static void Main(string[] args)
		{
			MyData p1 = new MyData();

			Console.WriteLine("ToString: {0}", p1.ToString());
			Console.WriteLine("Hash code: {0}", p1.GetHashCode());
			Console.WriteLine("Type: {0}", p1.GetType());

			MyData p2 = p1;
			object o = p2;
			// Are the references pointing to the same object in memory?
			if (o.Equals(p1) && p2.Equals(o))
			{
				Console.WriteLine("Same instance!");
			}
			Console.ReadLine();
		}
	}
}