Enumerable::SequenceEqual<TSource> Method (IEnumerable<TSource>^, IEnumerable<TSource>^, IEqualityComparer<TSource>^)
Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>.
Assembly: System.Core (in System.Core.dll)
public: generic<typename TSource> [ExtensionAttribute] static bool SequenceEqual( IEnumerable<TSource>^ first, IEnumerable<TSource>^ second, IEqualityComparer<TSource>^ comparer )
Parameters
- first
-
Type:
System.Collections.Generic::IEnumerable<TSource>^
An IEnumerable<T> to compare to second.
- second
-
Type:
System.Collections.Generic::IEnumerable<TSource>^
An IEnumerable<T> to compare to the first sequence.
- comparer
-
Type:
System.Collections.Generic::IEqualityComparer<TSource>^
An IEqualityComparer<T> to use to compare elements.
Return Value
Type: System::Booleantrue if the two source sequences are of equal length and their corresponding elements compare equal according to comparer; otherwise, false.
Type Parameters
- TSource
The type of the elements of the input sequences.
| Exception | Condition |
|---|---|
| ArgumentNullException | first or second is null. |
The SequenceEqual<TSource>(IEnumerable<TSource>^, IEnumerable<TSource>^, IEqualityComparer<TSource>^) method enumerates the two source sequences in parallel and compares corresponding elements by using the specified IEqualityComparer<T>. If comparer is null, the default equality comparer, Default, is used to compare elements.
The following example shows how to implement an equality comparer that can be used in the SequenceEqual<TSource>(IEnumerable<TSource>^, IEnumerable<TSource>^, IEqualityComparer<TSource>^) method.
After you implement this comparer, you can use sequences of Product objects in the SequenceEqual<TSource>(IEnumerable<TSource>^, IEnumerable<TSource>^, IEqualityComparer<TSource>^) method, as shown in the following example.
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1