Custom generic classes use the set and set interfaces provided by Microsoft.

// Implement the getenumerator () method in the ienumerable <A> interface, in order to support foreach Traversal
Class myclass <A>: ienumerable <A>
{
List <A> List = new list <A> ();

Private list <A> items;
Public list <A> items
{
Get {return list ;}
}

// Number of elements
Private int count;
Public int count
{
Get {return list. Count ;}
Set {COUNT = value ;}
}

Public void add (a item)
{
This. List. Add (item );
}

Public bool remove (a item)
{
Return this. List. Remove (item );
}

Public void removeat (INT index)
{
This. List. removeat (INDEX );
}

# Region ienumerable <A> Member

Public ienumerator <A> getenumerator ()
{
Return list. getenumerator ();
}

# Endregion

# Region ienumerable Member

System. Collections. ienumerator system. Collections. ienumerable. getenumerator ()
{
Throw new notimplementedexception ();
}

# Endregion
}

 

****************/
Static void main (string [] ARGs)
{
Myclass <student> myclass = new myclass <student> ();
Student stu1 = new student () {stuname = "Zhang San", stuno = "s001", stuage = 23 };
Student stu2 = new student () {stuname = "", stuno = "s002", stuage = 24 };
Myclass. Add (stu1 );
Myclass. Add (stu2 );
Console. writeline (myclass. Count );
Foreach (student item in myclass)
{
Console. writeline (item. stuname );
}
}

// Use
****************/
// Static void main (string [] ARGs)
//{
//// Integer and string can be compared to the size, so they can be sorted
/// Arraylist arr = new arraylist ();
/// Arr. Add ("AA ");
/// Arr. Add ("ad ");
/// Arr. Add ("AC ");
/// Arr. Add ("aw ");
/// Arr. Add ("ad ");
/// Foreach (VAR item in ARR)
////{
/// Console. writeline (item );
////}
/// Arr. Sort (); // sort
/// Console. writeline ("sorted :");
/// Foreach (VAR item in ARR)
////{
/// Console. writeline (item );
////}
//// Class
// List <student> arr = new list <student> ();
// Student stu1 = new student () {stuname = "zhangsan", stuno = "s001", stuage = 23 };
// Student stu2 = new student () {stuname = "", stuno = "s002", stuage = 14 };
// Student stu3 = new student () {stuname = "Wang Wu", stuno = "s003", stuage = 28 };
// Student stu4 = new student () {stuname = "Zhao ", stuno = "s004", stuage = 26 };
// Arr. Add (stu1 );
// Arr. Add (stu4 );
// Arr. Add (stu3 );
// Arr. Add (stu2 );
// Foreach (VAR item in ARR)
//{
// Console. writeline (item. stuno + "-" + item. stuname + "-" + item. stuage );
//}
/// Arr. Sort (); // sort (Implementation Interface)
// Arr. Sort (New agecomparerdesc (); // sort (comparator)
// Console. writeline ("sorted :");
// Foreach (VAR item in ARR)
//{
// Console. writeline (item. stuno + "-" + item. stuname + "-" + item. stuage );
//}
//}