Enumerable.Distinct<'TSource> Method (IEnumerable<'TSource>, IEqualityComparer<'TSource>)
Returns distinct elements from a sequence by using a specified IEqualityComparer<'T> to compare values.
Assembly: System.Core (in System.Core.dll)
static member Distinct<'TSource> : source:IEnumerable<'TSource> * comparer:IEqualityComparer<'TSource> -> IEnumerable<'TSource>
The sequence to remove duplicate elements from.
Return ValueType: System.Collections.Generic.IEnumerable<'TSource>
An IEnumerable<'T> that contains distinct elements from the source sequence.
The type of the elements of source.
This method is implemented by using deferred execution. The immediate return value is an object that stores all the information that is required to perform the action. The query represented by this method is not executed until the object is enumerated either by calling its GetEnumerator method directly or by using foreach in Visual C# or For Each in Visual Basic.
The Default, is used to compare values.method returns an unordered sequence that contains no duplicate values. If comparer is null, the default equality comparer,
The following example shows how to implement an equality comparer that can be used in themethod.
After you implement this comparer, you can use a sequence of Product objects in the method, as shown in the following example.
Available since 8
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Available since 8.1