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ImmutableList<T>.BinarySearch Method (T, IComparer<T>)

Searches the entire sorted list for an element using the specified comparer and returns the zero-based index of the element.

Namespace:  System.Collections.Immutable
Assembly:  System.Collections.Immutable (in System.Collections.Immutable.dll)

public int BinarySearch(
	T item,
	IComparer<T> comparer


Type: T

The object to locate. The value can be null for reference types.

Type: System.Collections.Generic.IComparer<T>

The comparer implementation to use when comparing elements or null to use the default comparer.

Return Value

Type: System.Int32
The zero-based index of item in the sorted List, if item is found; otherwise, a negative number that is the bitwise complement of the index of the next element that is larger than item or, if there is no larger element, the bitwise complement of Count.


comparer is null, and the default comparer cannot find an comparer implementation for type T.

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