Class IEqualityComparerEx

Class containing some extension methods for System.Collections.Generic.IEqualityComparer<T>.

Inheritance
System.Object
IEqualityComparerEx
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace:Extend
Assembly:Extend.dll
Syntax
public static class IEqualityComparerEx

Methods

| Improve this Doc View Source

By<TSource, TKey>(Func<TSource, TKey>, IEqualityComparer<TKey>)

Creates an equality comparer based on the specified comparison key and key comparer.

Declaration
public static IEqualityComparer<TSource> By<TSource, TKey>(Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer = null)
Parameters
Type Name Description
System.Func<T, TResult><TSource, TKey> keySelector

A function that returns the comparison key.
System.Collections.Generic.IEqualityComparer<T><TKey> comparer

An optional comparer, used to compare the keys.
Returns
Type Description
System.Collections.Generic.IEqualityComparer<T><TSource>

Returns an equality comparer based on the specified comparison key and key comparer.
Type Parameters
Name Description
TSource The type of the objects to test for equality.
TKey The type of the key to compare.
Exceptions
Type Condition
System.ArgumentNullException

keySelector can not be null.