C# | Add an object to the end of Collection<T>
Last Updated :
01 Feb, 2019
Collection<T>.Add(T) method is used to add an object to the end of the Collection<T>.
Syntax :
public void Add (T item);
Here, item is the object to be added to the end of the Collection<T>. The value can be null for reference types.
Below given are some examples to understand the implementation in a better way:
Example 1:
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
class GFG {
public static void Main()
{
Collection< string > myColl = new Collection< string >();
myColl.Add( "A" );
myColl.Add( "B" );
myColl.Add( "C" );
myColl.Add( "D" );
myColl.Add( "E" );
Console.WriteLine( "The number of elements in myColl are : "
+ myColl.Count);
Console.WriteLine( "The elements in myColl are : " );
foreach ( string str in myColl)
{
Console.WriteLine(str);
}
}
}
|
Output:
The number of elements in myColl are : 5
The elements in myColl are :
A
B
C
D
E
Example 2:
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
class GFG {
public static void Main()
{
Collection< int > myColl = new Collection< int >();
myColl.Add(2);
myColl.Add(3);
myColl.Add(4);
myColl.Add(5);
Console.WriteLine( "The number of elements in myColl are : "
+ myColl.Count);
Console.WriteLine( "The elements in myColl are : " );
foreach ( int i in myColl)
{
Console.WriteLine(i);
}
}
}
|
Output:
The number of elements in myColl are : 4
The elements in myColl are :
2
3
4
5
Note:
- Collection<T> accepts null as a valid value for reference types and allows duplicate elements.
- This method is an O(1) operation.
Reference:
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