ToLookup Method

Enumerable.ToLookup Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Creates a generic Lookup<TKey, TElement> from an IEnumerable<T>.

This member is overloaded. For complete information about this member, including syntax, usage, and examples, click a name in the overload list.

  NameDescription
Public method Static member ToLookup<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>) Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to a specified key selector function.
Public method Static member ToLookup<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IEqualityComparer<TKey>) Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to a specified key selector function and key comparer.
Public method Static member ToLookup<TSource, TKey, TElement>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>) Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to specified key selector and element selector functions.
Public method Static member ToLookup<TSource, TKey, TElement>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>, IEqualityComparer<TKey>) Creates a Lookup<TKey, TElement> from an IEnumerable<T> according to a specified key selector function, a comparer and an element selector function.
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