TECH KNOW STUDY

• A login user control is best example for this having username and password fields and button. With the help of web user control we can create one single login control and then put it into numbers of pages of your website.
• That reduce your work for again and again creation of login fields in every page.
• We can call user control created into .ASCX page in every .ASPX page through some sort of lines.

1.  Declaring a delegate. 
2.   Defining delegate methods. 
3.  Creating delegate objects.  
4. Invoking delegate objects.

Hay friends i give u simple help to design a simple calc in visual basic through c#.
i consider that you know how to work on designing phase.
so go on and make your own calc with your name, dimension.
you can also introduce your own feature in your calc.
so now start with this............
a simpe picture of my calc is.........

1)   .net have its own framework &support 45 languages.

2)   Console application in c#

 a) if else  
b) loop
    * for
    * while
    * do while
    * for each
c) switch case
d) array
    * 2D
    * 3D
    * jugged
e) function
    * call by value& reference
    * out parameter
    * param array
f) file handling
g) oops
h) delegates

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace circle_area
{
    class Program
    {
        static void Main(string[] args)
        {
            circle x = new circle(3.5);
            double Area = x.CalArea();
            Console.WriteLine("the area of circle is: {0}", Area);
            Console.ReadLine();
        }
    }
    class circle
    {
        private const double C = 3.14;
        private double radius;
        public circle()
        {
        }
        public circle(double radius)
        {

            this.radius = radius;
        }
        public double Radius
        {
            get { return radius; }
            set { radius = value; }
        }
        public double CalArea()
        {
            return C * radius * radius;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace constructor
{
    class Program
    {
        static void Main(string[] args)
        {
            string a = "", b = "";
            Console.WriteLine("enter name");
            student s = new student(a, b);
            a = s.Name = Console.ReadLine();
            b = s.Add = Console.ReadLine();
            Console.WriteLine("nmae={0} address={1}", a, b);
            Console.ReadLine();

        }
    }
    class student
    {
        private string name;//private variable start from small letter.
        private string add;

        public string Name//public variable start from capital letter.and we define a private member publicaly to set his properties.
        {
            get { return name; }
            set { }
        }
        public string Add
        {
            get { return add; }
            set { }
        }
        public student()
        { }
        public student(string name):this()//here this tag is used for chaining of constructor.
        {
            this.name = name;//here this tag is used to fix that the transfer o value. because here parameter and varibal of same name
                               //i.e. name and add.
        }
        public student(string name, string add):this(name)
        {
            this.name = name;
            this.add = add;
        }
      
    }
}

c# is language as same as java, here we have namespace which work like package.
Here console.readline work for print any thing on the screen, and console.readline work for reading or we can say for scaning purpose.
c# is also a object oriented programming language
 

program 1

using system;
using system.collection.generic;
using system.linq;
using system.text;

namespace program_1
{
class print
{
static void Main(String[] args)
{
console.WriteLine("this is the first program of c#");
console.ReadLine();
print pr=new print();

}

}

}