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RT.Util.Core
- RT.KitchenSink
- RT.KitchenSink.Collections
- RT.KitchenSink.Geometry
- RT.KitchenSink.Lex
- RT.KitchenSink.Streams
- RT.Util
- RT.Util.Collections
- RT.Util.Consoles
- RT.Util.ExtensionMethods
  - ArrayExtensions
  - CollectionExtensions
  - ConsecutiveGroup<TItem, TKey>
  - ConsoleExtensions
  - CustomComparerExtensions
  - DateTimeExtensions
  - DictionaryExtensions
  - IEnumerableExtensions
    - All<>(source, predicate)
    - AllPairs<>(source)
    - AllPairs<>(source, selector)
    - AllSequencesEqual<>(sources)
    - Any<>(source, predicate)
    - Concat<>(source, element)
    - Concat<>(head, tail)
    - ConsecutivePairs<>(source, closed)
    - FirstOrDefault<>(source, default)
    - FirstOrDefault<>(source, predicate, default)
    - FirstOrDefault<>(source, predicate, resultSelector, default)
    - FirstOrNull<>(source)
    - FirstOrNull<>(source, predicate)
    - GroupConsecutive<>(source, itemEquality)
    - GroupConsecutive<>(source, itemComparer)
    - GroupConsecutiveBy<>(source, selector, keyComparer)
    - IndexOf<>(source, predicate)
    - IndexOf<>(source, predicate)
    - IndexOf<>(source, predicate, startIndex)
    - IndexOf<>(source, element, comparer)
    - InsertBetween<>(source, extraElement)
    - InsertBetweenWithAnd<>(source, comma, and)
    - JoinString<>(values, separator, prefix, suffix, lastSeparator)
    - LastIndexOf<>(source, predicate)
    - MaxCountElement<>(source, comparer)
    - MaxCountElement<>(source, count, comparer)
    - MaxElement<>(source, valueSelector)
    - MaxElementOrDefault<>(source, valueSelector, defaultValue)
    - MaxElements<>(source, valueSelector)
    - MaxIndex<>(source, valueSelector)
    - MaxIndexOrNull<>(source, valueSelector)
    - MaxOrDefault<>(source, default)
    - MaxOrDefault<>(source, selector, default)
    - MaxOrNull<>(source)
    - MaxOrNull<>(source, selector)
    - MinElement<>(source, valueSelector)
    - MinElementOrDefault<>(source, valueSelector, defaultValue)
    - MinElements<>(source, valueSelector)
    - MinIndex<>(source, valueSelector)
    - MinIndexOrNull<>(source, valueSelector)
    - MinOrDefault<>(source, default)
    - MinOrDefault<>(source, selector, default)
    - MinOrNull<>(source)
    - MinOrNull<>(source, selector)
    - Order<>(source)
    - Order<>(source, comparer)
    - OrderLazy<>(source)
    - OrderLazy<>(source, comparer)
    - Permutations<>(source)
    - SelectChain<>(obj, next)
    - SelectConsecutivePairs<>(source, closed, selector)
    - SelectIndexWhere<>(source, predicate)
    - SelectNullable<>(source)
    - SelectTwo<>(source, selector1, selector2)
    - SequenceEqual<>(sequence1, sequence2)
    - SkipLast<>(source, count, throwIfNotEnough)
    - Split<>(splitWhat, splitWhere)
    - Split<>(source, chunkSize)
    - StartsWith<>(source, sequence)
    - StartsWith<>(source, sequence, comparer)
    - Subsequences<>(source, minLength, maxLength)
    - SumUnchecked(source)
    - SumUnchecked<>(source, selector)
    - ToDictionary<>(source, comparer, ignoreDuplicateKeys)
    - ToDictionary2<>(source, key1Selector, key2Selector, comparer1, comparer2)
    - ToDictionary2<>(source, key1Selector, key2Selector, elementSelector, comparer1, comparer2)
    - ToQueue<>(source)
    - ToStack<>(source)
    - UniquePairs<>(source)
    - WhereNotNull<>(src)
  - IQueryableExtensions
  - IsoDateFormat
  - IsoDatePrecision
  - JsQuotes
  - NumericExtensions
  - ProcessExtensions
  - RandomExtensions
  - ReadOnlyCollectionExtensions
  - ReflectionExtensions
  - RngExtensions
  - StreamExtensions
  - StringExtensions
  - TextReaderWriterExtensions
  - XmlLinqExtensions
- RT.Util.ExtensionMethods.Obsolete
- RT.Util.Geometry
- RT.Util.IL
- RT.Util.Paths
- RT.Util.Streams
- RT.Util.Text
- RT.Util.Threading
PropellerApi
PuzzleSolvers
RT.ArithmeticCoding
RT.BigInteger
RT.CommandLine
RT.Coordinates
RT.Dijkstra
RT.Generex
RT.Json
RT.Lingo
RT.Lingo.Base
RT.NUnitDirect
RT.PostBuild
RT.SelfService
RT.Serialization
RT.Serialization.Binary
RT.Serialization.Json
RT.Serialization.Xml
RT.Servers
RT.TagSoup
RT.Util
RT.Util.Legacy

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Extension method: Dictionary<TKey1, Dictionary<TKey2, TValue>> ToDictionary2<TSource, TKey1, TKey2, TValue>(this IEnumerable<TSource>, Func<TSource, TKey1>, Func<TSource, TKey2>, Func<TSource, TValue>, IEqualityComparer<TKey1>, IEqualityComparer<TKey2>)

Declared in: RT.Util.ExtensionMethods.IEnumerableExtensions

Declaration

public static Dictionary<TKey1, Dictionary<TKey2, TValue>> ToDictionary2<TSource, TKey1, TKey2, TValue>(
    this IEnumerable<TSource> source,
    Func<TSource, TKey1> key1Selector,
    Func<TSource, TKey2> key2Selector,
    Func<TSource, TValue> elementSelector,
    IEqualityComparer<TKey1> comparer1 = null,
    IEqualityComparer<TKey2> comparer2 = null
)

Summary

Creates a two-level dictionary from an enumerable collection according to two specified key selector functions and optional key comparers.

Generic type parameters

TSource	The type of the elements of source.
TKey1	The type of the keys returned by key1Selector.
TKey2	The type of the keys returned by key2Selector.
TValue	The type of the value returned by elementSelector.

Parameters

this IEnumerable<TSource>	source	Source collection to create a dictionary from.
Func<TSource, TKey1>	key1Selector	A function to extract the first-level key from each element.
Func<TSource, TKey2>	key2Selector	A function to extract the second-level key from each element.
Func<TSource, TValue>	elementSelector	A transform function to produce a result element value from each element.
IEqualityComparer<TKey1>	comparer1	An equality comparer to compare the first-level keys.
IEqualityComparer<TKey2>	comparer2	An equality comparer to compare the second-level keys.