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)
[ExtensionAttribute] public: generic<typename TSource> static bool SequenceEqual( IEnumerable<TSource>^ first, IEnumerable<TSource>^ second, IEqualityComparer<TSource>^ comparer )
Type Parameters
- TSource
The type of the elements of the input sequences.
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.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).| Exception | Condition |
|---|---|
| ArgumentNullException | first or second is nullptr. |
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 nullptr, 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.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
