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)
static member SequenceEqual<'TSource> : first:IEnumerable<'TSource> * second:IEnumerable<'TSource> * comparer:IEqualityComparer<'TSource> -> bool
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