Generic Classes In C#

namespace Consolepractice
{
    class Program {
        public static void Main(string[] args) {
            // Use the generic type Demo with an int type parameter.
            Demo < int > test1 = new Demo < int > (2);
            // Call the Write method.
            test1.print();
            // Use the generic Demo with a string type parameter.
            Demo < string > test2 = new Demo < string > ("soumalya das");
            test2.print();
            // Use the generic Demo with a float type parameter.
            Demo < float > test3 = new Demo < float > (4.5 f);
            test3.print();
            Console.ReadKey();
        }
    }
    class Demo < T > {
        T _value;
        public Demo(T t) {
            // The field has the same type as the parameter.
            this._value = t;
        }
        public void print() {
            Console.WriteLine(this._value);
        }
    }
}