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class System.Linq.Lookup<TKey, TElement>
Assembly: System.Linq
Inheritance: object → Lookup
Implemented Interfaces
- ILookup`2 (Inherits: Collections.Generic.IEnumerable<IGrouping<TKey, TElement>>Collections.IEnumerable)
Represents a collection of keys each mapped to one or more values.
Properties
public
int
Count
Gets the number of key/value collection pairs in the <see cref="T:System.Linq.Lookup`2" /> .
public
Collections.Generic.IEnumerable<TElement>
Item
Methods
public
Collections.Generic.IEnumerable<TResult>
ApplyResultSelector(Func<TKey, Collections.Generic.IEnumerable<TElement>, TResult> resultSelector)
Applies a transform function to each key and its associated values and returns the results.
Returns A collection that contains one value for each key/value collection pair in the <see cref="T:System.Linq.Lookup`2" /> .
resultSelector
A function to project a result value from each key and its associated values.
public
bool
Contains(TKey key)
Determines whether a specified key is in the <see cref="T:System.Linq.Lookup`2" /> .
Returns <see langword="true" /> if <paramref name="key" /> is in the <see cref="T:System.Linq.Lookup`2" /> ; otherwise, <see langword="false" /> .
key
The key to find in the <see cref="T:System.Linq.Lookup`2" /> .
public
Collections.Generic.IEnumerator<IGrouping<TKey, TElement>>
GetEnumerator()
Returns a generic enumerator that iterates through the <see cref="T:System.Linq.Lookup`2" /> .
Returns An enumerator for the <see cref="T:System.Linq.Lookup`2" /> .
public
bool
Equals(object obj)
Inherited from object
protected
void
Finalize()
Inherited from object
public
int
GetHashCode()
Inherited from object
protected
object
MemberwiseClone()
Inherited from object
public
string
ToString()
Inherited from object