QueryableEx.Distinct(TSource, TKey) Method (IQueryable(TSource), Expression(Func(TSource, TKey)), IEqualityComparer(TKey))

QueryableExDistinctTSource, TKey Method (IQueryableTSource, ExpressionFuncTSource, 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.Providers (in System.Interactive.Providers.dll) Version: 1.2.0.0

Syntax

Copy

public static IQueryable<TSource> Distinct<TSource, TKey>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TKey>> keySelector,
	IEqualityComparer<TKey> comparer
)

Parameters

source: Type: System.LinqIQueryableTSource
Source sequence.
keySelector: Type: System.Linq.ExpressionsExpressionFuncTSource, 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: IQueryableTSource
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 IQueryableTSource. 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).

Reference

QueryableEx Class

Distinct Overload

System.Linq Namespace