Collection. IList. Index Of(Object) Method
virtual int System.Collections.IList.IndexOf(System::Object ^ value) = System::Collections::IList::IndexOf;
int IList.IndexOf (object value);
int IList.IndexOf (object? value);
abstract member System.Collections.IList.IndexOf : obj -> int override this.System.Collections.IList.IndexOf : obj -> int
Function IndexOf (value As Object) As Integer Implements IList.IndexOf
The zero-based index of the first occurrence of
value within the entire StringCollection, if found; otherwise, -1.
The StringCollection is searched forward starting at the first element and ending at the last element.
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.