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??? ??? ?????? ??? ??? ?? ??? ?? ??? ??? ??? ?? ??? ???? ???? ? ??? ?????. ?????? ??? ???? ??? ?? "?????"?? ???? ???? ?????.

??:

??? ????? ???? ???? ? ?? ????? ??, ??? ???.

interface <name_for_interface>
{
//abstract methods
//abstract properties.
}

????? C#?? ?????? ?? ?? ??? ????. ? ??? '?????' ???? ???? ????? ??, ?? ??? ?? ??? ? ???? ?????. C#??? ??? ?? ??? ??? ?? ?????? ???? ??? ? ????. ??? ?????? ??? ???, ???, ?? ? ???? ??? ??? ? ????.

C# ?????? ? ??????

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?????? ?? ??????

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• ?? ??: C#??? ??? ???? ??? ?? ????? ???? ?? ???? ?? ??? ???? ? ????. C#? ???? ??? ?? ?? ??? ?? ??? C#??? ?? ??? ???? ????. ??? ?????? ???? ?? ?????? ?? ???? ??? ? ????.

C# ??????? ????? ?? ??? ?????.

1. ?? – C#?? ?????? ??? ??, ??, ??? ?? ??? ??? ???? ?????. ??? ???? ?? ??? ???? ???? ? ??? ??? ???. ?????? ???? ???? ?????? ??? ?? ??? ?? ???? ??? ???? ???.
2. ?? – ????? ??? ????? ?? ??? ???, ??, ??? ? ??????. ?? ?? ???? ???? ?? ??? ???? ??? ????? ??? ??? ?????. ??? ??? ??? ??? ?? ???? ??? ????, ?? ???? ????, ??? ? ?? ???? ???? ?? ???.
3. ?? – ?????? ???? ???? ?????? ??? ?? ??? ?? ??? ???? ???. ???? :interfaceName ??? ???? ?????? ????? ????? ??? ? ????. ?? ??:

   public class MyClass : IMyInterface
   {
   public void Method1()
   {
   // Method implementation
   }public string Property1 { get; set; }
   
   public event EventHandler Event1;
   }

4. ?? ??: C#? ?????? ?? ?? ??? ?????. ???? ?? ?????? ??? ? ???? ??? ?? ??? ??? ??? ?? ?? ??? ???? ??? ??? ? ????. ?? ?? ?? ?? ??? ??? ????? ??? ???? ??? ??? ???? ?? ? ????.
5. ????? ??: C#?? ????? ??? ???? ?? ?????? ?? ??? ?? ?????? ??? ??? ????? ??? ? ????. ?? ?????? ???? ???? ??? ?? ???? ?? ??? ???? ???. ?? ?? ????? ??? ???? ?? ???? ???? ?? ???? ???? ?? ? ????.

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?? #1

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??:

using System;
namespace MyApplication {
interface SampleInterface {
void InterfaceMethod();
}
class Int_Example : SampleInterface
{
public void InterfaceMethod() {
Console.WriteLine("\nThis is simple example of Interface in C#.");
}
}
class Program {
static void Main(string[] args) {
Int_Example myInterface = new Int_Example();
myInterface.InterfaceMethod();
Console.Read();
}
}
}

?? ??: use? ???????? ???? ?? ?????? ??? ?? ???? ?? SampleInterface? ?????. ????? ??? ? ????? ?? ??? ????. ?? ?? ??? ?? ?????? ???? ? ???? ????. ??? ??? ?? ??? ??? ???? ?? ?? ?? ????? ??? ???? ?????? ?????. Int_Example ??? ??? ??? ??? ????? ???? ???, ? ???? ??? ?????. ?? "??? C# ?????? ??? ????."?? ??? ??? print ?? ??????.

Then begins our mail class, namely Program, with the static void main statement. Inside our main class, we have created a new object for our Int_Example class which inherits interface. The new object is created and to the next line, our method created earlier is called up. Finally, our newly created object will call the earlier created method and the body inside that method will be executed here. With Console.Read(); the program will wait for user input before exiting.

Output:

Upon successful compilation and execution, the program must simply print the statement: “This is a simple example of Interface in C#.”

Example #2

Arithmetic operations using the interface.

Code:

using System;
namespace arth_interface {
public interface SampleInterface {
void sam_add(int a, int b);
void sam_sub(int a, int b);
void display();
}
class interface_class : SampleInterface {
int x, y;
public void sam_add(int a, int b) {
int m, n;
m = a;
n = b;
x = m + n;
}
public void sam_sub(int a, int b) {
int m, n;
m = a;
n = b;
y = a - b;
}
public void display() {
Console.WriteLine("Added Value is:" + x);
Console.WriteLine("Subtracted value is:" + y);
}
}
class arth_interface {
static void Main(string[] args) {
interface_class obj_interface_class = new interface_class();
int fnumber, snumber;
Console.WriteLine("Please Enter 1st Number to perform Addition and Subtraction:");
fnumber = Convert.ToInt16(Console.ReadLine());
Console.WriteLine("Now 2nd Number to perform Addition and Subtraction:");
snumber = Convert.ToInt16(Console.ReadLine());
obj_interface_class.sam_add(fnumber, snumber);
obj_interface_class.sam_sub(fnumber, snumber);
obj_interface_class.display();
Console.ReadKey();
}
}
}

Code Interpretation: Similar to our first example, we have used and namespace statements, followed by the interface and its body with methods. We have two basic methods for addition and subtraction with void as return type, two integers inside every method, respectively. Next, we have our class which implements our interface.

We’ve declared two integers and then we have our first method to calculate addition. Here is the operation that needs to be done for addition and the same is for the subtraction. Then we have our display method, which consists of two print statements, printing addition and subtraction values of the numbers passed.

Finally, we have our class with the main method, where we initially created an object for our interface. Then the program prints “Please Enter the 1st Number to perform Addition and Subtraction:”, where the user inputs a first number and the later second number, for the purpose of calculations. With the object created earlier, the program calls the add and sub-methods from the interface and the same operations are done. At last, we have our display method, which displays our results as defined in the display method and ReadKey(); method holds up our program until any key is pressed.

Output:

Advantages

Below are some of the advantages given.

• One of the major advantages of Interface in C# is a better alternative to implement multiple inheritances.
• The interface enables the plug-and-play method.
• Complete Abstraction can be achieved by the implementation of Interface.
• Along with making our code easy to maintain, concept loose coupling can be achieved.

Conclusion

We have understood what Interface in C# is. The proper syntax for an interface along with an explanation. To wrap it up, Interfaces in C# are a way to fill the emptiness of multiple inheritances in the language. Later we learned why do we actually need the interface in C# followed by the examples to demonstrate the understanding of the interfaces. The first example was to demonstrate simple use of interface while with the second example we implemented arithmetic operations, followed by Code Interpretation and output screenshot.

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