ASP.NET Interview Q&A

How to Delete Cookies?

HttpCookie currentUser=HttpContext.Current.Request.Cookies["CookiesValue"];
HttpContext.Current.Response.Cookies.Remove("CookiesValue");
currentUser.Expires=DataTime.Now.AddMinutes(-20);
currentUser.value=null;
HttpContext.Current.Response.SetCookie(currentUser);


Delegate is an object which holds the  references to a method  within the delegate object.It is  type safe object and invoking the method asynchronously manner.

Advantage of Delegates

1 Improved the performance of Application
2 Call a method asynchronous.

Type of Delegate 
1. Single Delegate and
2 Multicast  Delegate
3 Generic Delegate


Single Delegate :-A delegate is need to pass single parameter as reference to a method with the delegate object.


Multicast Delegate: - When we need to pass more than one parameter as reference  to a method within delegate object.


--- String and number Reverse--

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        { //---reverse string ----
            //Console.WriteLine("Enter a number for reverse");
            //int number = Convert.ToInt32(Console.ReadLine());
            //int revers = 0;
            //while (number > 0)
            //{
            //    int rem = number % 10;
            //    revers = (revers * 10) + rem;
            //    number = number / 10;
            //}
            //Console.WriteLine(revers);
            //Console.ReadLine();
            //-- Reverse string--
            Console.WriteLine("enter your name");
            string name = Console.ReadLine();
            var temp = "";
            for (int i = name.Length - 1; i >= 0; i--)
            {
                temp += name[i].ToString();
             
            }
            Console.WriteLine(temp);
            Console.ReadLine();

        }
    }
}

----- Duplicate character in string --
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
          Console.Write("Enter a word");
            string data = Console.ReadLine();

            RemoveDuplicatecharacter(data);
        }
        static string RemoveDuplicatecharacter(string value)
        {
            string result = string.Empty;
            string temp = string.Empty;
            foreach (char data in value)
            {
                if (temp.IndexOf(data) == -1)
                {
                    temp += data;
                    result += data;
                }
            }
            Console.WriteLine(result);
            Console.Read();
            return result;
           
         
           
        }
    }
}