Queue.Contains(Object) Method

Reference

Definition

Namespace:: System.Collections

Assemblies:: mscorlib.dll, System.Collections.NonGeneric.dll

Assembly:: System.Collections.NonGeneric.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: Queue.cs

Source:: Queue.cs

Source:: Queue.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Determines whether an element is in the Queue.

public:
 virtual bool Contains(System::Object ^ obj);

public virtual bool Contains (object obj);

public virtual bool Contains (object? obj);

abstract member Contains : obj -> bool
override this.Contains : obj -> bool

Public Overridable Function Contains (obj As Object) As Boolean

Parameters

obj: Object

The Object to locate in the Queue. The value can be null.

Returns

Boolean

true if obj is found in the Queue; otherwise, false.

Remarks

This method determines equality by calling Object.Equals.

This method performs a linear search; therefore, this method is an O(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 obj 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 obj parameter on the objects in the collection.

Applies to

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