}

class operatordemo
{
int a, b;
string s1, s2;
public operatordemo()
{
a = 10; b = 20; s1 = "csharp"; s2 = ".net";
}
public static int operator +(operatordemo r1, operatordemo r2)
{
int tot;
string str;
str = r1.s1 + r2.s2;
tot = r1.a + r2.b;
MessageBox.Show(str);
return tot;
}
}
private void button1_Click(object sender, EventArgs e)
{
operatordemo obj1 = new operatordemo();
operatordemo obj2 = new operatordemo();
int t;
t = obj1+obj2;
MessageBox.Show(t.ToString());
}

Press F5 and you see this Outputs

GOT it?
First Page in Operator Overloading

Operator Overloading:
                Using operator overloading we can change the meaning to the existing operator, All operator over-loading functions should be static, Using operator keyword we can over-load unary-operator and binary operators.

Example on Operator Overloading:

Start Microsoft Visual Studio - Click on file- New- Open New Project

Double click on Button here comes the Coding Part

You need to include this Overloading functions in Our Class Named "emp" as shown below

class emp
{
       int ts;
//I am creating three functions using same name
       public void tsal(int sal)
       {
             MessageBox.Show(sal.ToString(),"Salary");
       }
       public void tsal(int sal,int bonus)
      {
            ts = sal + bonus;
            MessageBox.Show(ts.ToString(),"Salar+Bonus is ");
      }
      public void tsal(int sal, int bonus, int ta)
      {
             ts = sal + bonus + ta;
             MessageBox.Show(ts.ToString(),"Salary+Bonus+ta is ");
       }

}
private void Form1_Load(object sender, EventArgs e)
{

}
//I am calling three functions using button click event
private void button1_Click(object sender, EventArgs e)
{
      emp e1 = new emp();
      int s, b, t;
      s = 5000;
      b = 300;
       t = 200;
       e1.tsal(s);
       e1.tsal(s,b);
       e1.tsal(s,b,t);

}

Coming to the Output Use f5

You see a window as shown below

Function Overloading

                          Using function overloading we can implement any no.of functions with the same name. by providing different prototypes or Arguments, While implement the function overloading we have to check only with function name and with the parameters, not with the return types.

Example on Function Over-loading

Start Microsoft Visual Studio - Click on file- New- Open New Project

Double click on Button here comes the Coding Part

Designtime Binding:
                                 In the design time binding the total instructions we can give using design mode to the compiler the design time binding we can classify in to two types

1. Function Overloading
   
   • void tsal()
   • void tsal(int s)
   • void tsal(int s,int b)
   • int tsal();
2. Operator Overloading
   
   • 10+20
   • str+str
   • obj+obj

Polymorphism :
                           The polymorphism is the concept of sharing and ability features to the multiple forms, The polymorphism. we can classify into two types

1. Designtime Binding
   
   • Function overloading
   • Operator overloading
2. Runtime Binding
   
   • virtual function

Oops Concepts

• Data Encapsulation
• Data Abstraction
• Inheritance
• Polymorphism

The code itself will look very complicated, if you're new to programming. We'll get to it shortly. For now, right click the Program.cs tab at the top, and click Close from the menu that appears:







The reddish colour text is something you can change. You can add a Title, Description, Copyright, Trademark, etc.

But right click the AssemblyInfo.cs tab at the top, and click Close from the menu. Now, in the Solution Explorer, click the plus symbol next to References:
These are references to code built in to C#. Much later, you'll see how to add your own files to this section.

Before we add some code, let's save the project. We'll do that in the next part below.

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