SortedList.ContainsKey Method (Object)

 

Determines whether a SortedList object contains a specific key.

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

abstract ContainsKey : 
        key:Object -> bool
override ContainsKey : 
        key:Object -> bool

Parameters

key
Type: System.Object

The key to locate in the SortedList object.

Return Value

Type: System.Boolean

true if the SortedList object contains an element with the specified key; otherwise, false.

Exception Condition
ArgumentNullException

key is null.

InvalidOperationException

The comparer throws an exception.

The elements of a SortedList object are sorted by the keys either according to a specific IComparer implementation specified when the SortedList is created or according to the IComparable implementation provided by the keys themselves.

This method behaves exactly as the Contains method.

This method uses a binary search algorithm; therefore, this method is an O(log n) operation, where n is Count.

Starting with the .NET Framework 2.0, this method uses the collection’s objects’ Equals and CompareTo methods on item to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the Equals and CompareTo methods of the item parameter on the objects in the collection.

The following code example shows how to determine whether a SortedList object contains a specific element.

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Return to top
Show: