Types of Interfaces IEnumerable IEnumerable<T> IEnumerator Ienumerator<T> ICollection Icollection<T> Idictonary Ilist Ilist<T> Icompare IEqualityComparer<T>

2.  Introduction
 Types

3.  It makes programs more compact and easier.
 Contains Methods, Indexes, Events and
Properties.
 .NET class library defines 2 different interfaces-
1. Generic Interfaces
2. Non-Generic Interfaces

4.  IEnumerable
 IEnumerable<T>
 IEnumerator
 Ienumerator<T>
 ICollection
 Icollection<T>
 Idictonary
 Ilist
 Ilist<T>
 Icompare
 IEqualityComparer<T>

5. IEnumerable
 Supports simple iteration over non-generic collection
 Method –
GetEnumerator( )
IEnumerable<T>
 supports iteration over generic collection
 T- The type of objects to enumerate.
 Method –
GetEnumerator( )

6. IEnumerator
 Supports iteration over non-generic collection.
 Properties -
Current
 Methods -
MoveNext( )
Reset ( )
IEnumerator<T>
 Supports iteration over generic collection.
 T- type of object to enumerate
 Properties -
Current
 Methods -
MoveNext( )
Reset ( )
Dispose( )

7. ICollection
 Properties -
Count
IsSynchronized
IsReadonly
 Methods -
CopyTo ( )
GetEnumerator ( 0
ICollection<T>
 Defines methods to manipulate generic collections.
 T- type of elements in the collection
 Properties -
Count
IsReadonly
 Methods -
Add ( ) Clear ( )
Contains ( ) Remove ( )

8. IList
 Represents a non-generic collection of objects.
 Falls into categories -
1. Read-Only
2. Fixed Size
3.variable Size
 Properties -
Count
IsFixedSize
IsReadOnly
 Methods -
Add ( ) Clear ( )
Contains ( ) Remove ( )
CopyTO ( ) Insert ( )
IList<T> - Represents a generic collection of objects.

9. IDictonary
 Represents a non-generic collection of key/value pair
 Falls into categories -
1. Read-Only
2. Fixed Size
3.variable Size
 Properties –
Count
IsFixedSize
IsReadOnly
 Methods -
Add ( ) Clear ( )
Contains ( ) Remove ( )
CopyTo

10. IEqualityComparer
 Defines methods to support the comparison of objects for equality.
 Methods -
Equals ( )
GetHashCode ( )
IComparer
 Exposes a method that compares two objects.
 Methods -
Compare ( )

11. Thank you