| EnumerableExDistinctUntilChangedTSource, TKey Method (IEnumerableTSource, FuncTSource, TKey, IEqualityComparerTKey) |
Returns consecutive distinct elements based on a key value by using the specified equality comparer to compare key values.
Namespace: System.Linq
Assembly: System.Interactive (in System.Interactive.dll) Version: 1.2.0.0
SyntaxC#
public static IEnumerable<TSource> DistinctUntilChanged<TSource, TKey>( this IEnumerable<TSource> source, Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer )
Parameters
- source
- Type: System.Collections.GenericIEnumerableTSource
Source sequence. - keySelector
- Type: SystemFuncTSource, TKey
Key selector. - comparer
- Type: System.Collections.GenericIEqualityComparerTKey
Comparer used to compare key values.
Type Parameters
- TSource
- Source sequence element type.
- TKey
- Key type.
Return Value
Type: IEnumerableTSourceSequence without adjacent non-distinct elements.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableTSource. 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).See Also