Generics in c#

* Generic in c# gives reusability.
*Generic are equivalent to templet in c#.
*By using generic collection we can avoid boxing ,unboxing and casting conversion.
*Generic provide type safety.

i.Dictionary(key,Tvalue)
ii.list(Tkey)
iii.Queue(Tkey)
iv.stack(Tkey)
v.linkedlist<T>
vi.Hashset
vii.SortedDictionary<Tkey,Tvalue>

*All generic collection classes are present in "system.collection" generic name space

Sample code:

{

  B b =new B();

  A<int> a =new A<int>();

  A<float> a =new A<float>();

}

How to create object in generic class?

Ans:

public class D(T1,T2)

{

   D<int, int> d1=new D<int ,int>();

  }

How to create multiple signature declare in generic class?

Ans:

public class E<T1,T2,T3,T4>
  {

   D<int ,int,int,int> d1=new D<int,int,int,int>

}

Sample code2:

public class Test

{

  protected void page-load(-,-)

  {

   G<int> g1=new G<int>();

   int x1=g1.m(10);

   G<string> g2=new G<string>();

   string s2=g2.m("hello");

  }

}

public class G<T>

  {

    public T M(T t)

    {

     return t;

   }

public string m(string t)

  {

    return t;

   }

public int m(int t)

  {

   return t;

 }

}

NOTE:

By using generic  collection classes we can avoid all the problem present in normal collection classes(boxing.unboxing) or casting converstion.

 Example:

 {

  List<int> 1st salary =new list<int>();

  1st salary.Add(1000);

1st salary.Add(2000);

1st salary.Add(3000);

1st salary.Add(4000);

foreach(int i in 1st salary)

  {
   Response.write(i);

   }

}

How to create Method in generic class?

Ans:

{

  Apple a=new Apple();

  int r1=a.Add<int>(10);

  string s1=a.Add<string>("mango") ;

  }

}

Public class Apple

{

  public T Add<T>(T t1)    // generic method

  {

    return t;

   }

}