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EnumerableExDistinctTSource, TKey Method (IEnumerableTSource, FuncTSource, TKey, IEqualityComparerTKey)
Returns elements with a distinct 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
Syntax
C#
Copy
public static IEnumerable<TSource> Distinct<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: IEnumerableTSource
Sequence that contains the elements from the source sequence with distinct key values.

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