how to implement same class instantiate multiple time ?

ahmed salah

i work on csharp issue but i don't know how to solve it

i have two classes A AND B

how to instaniate it as below

A a =new A();

A B =new B();

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Uttam Kumar4y ago
You can achieve it by implementing inheritance
```
Class A {
    //…
}

Class B : A {
    //…
}
```
```
Program {
    Main() {
        A obj1 = new A();
        A obj2 = new B();
    }
}
```
You can do this in couple of ways

1. By defining class A as abstract

2. By defining an interface

3. By defining a normal class
Muhammad Imran Ansari4y ago
Check the following link:
https://www.geeksforgeeks.org/c-sharp-program-to-implement-the-same-method-in-multiple-classes/
Sachin Singh4y ago
For this create an interface and use dependency injection.
public interface IMain
{
  void Method1();
  ....other methods...
}

public class ClassA:IMain
{
  public void Method1()
{
// implementation
}
}

public class ClassB:IMain
{
  public void Method1()
{
// implementation
}
}
//Other layer
public class Layer2
{
private IMain _obj;
  public Layer2(IMain obj)
{
_obj=obj;
}
public void myMethod()
{
  _obj.Method1();
}

}
Or without DI
public class Layer2
{

public void myMethod()
{
IMain obj1= new Class1();
obj1.Method1();

IMain obj2= new Class2();

obj2.Method1();
}

}