StringCollection.IList.Contains(Object) Method
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Determines whether an element is in the StringCollection.
virtual bool System.Collections.IList.Contains(System::Object ^ value) = System::Collections::IList::Contains;bool IList.Contains(object value);bool IList.Contains(object? value);abstract member System.Collections.IList.Contains : obj -> bool
override this.System.Collections.IList.Contains : obj -> boolFunction Contains (value As Object) As Boolean Implements IList.Contains- value
- Object
The Object to locate in the StringCollection. The value can be null.
true if value is found in the StringCollection; otherwise, false.
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 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.
| Product | Versions |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
| UWP | 10.0 |
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