List<T>.IList.IndexOf(Object) Method
Definition
Important
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Determines the index of a specific item in the IList.
virtual int System.Collections.IList.IndexOf(System::Object ^ item) = System::Collections::IList::IndexOf;int IList.IndexOf (object item);abstract member System.Collections.IList.IndexOf : obj -> int
override this.System.Collections.IList.IndexOf : obj -> intFunction IndexOf (item As Object) As Integer Implements IList.IndexOfParameters
Returns
The index of item if found in the list; otherwise, -1.
Implements
Exceptions
item is of a type that is not assignable to the IList.
Remarks
This method determines equality using the default equality comparer EqualityComparer<T>.Default for T, the type of values in the list.
This method performs a linear search; therefore, this method is an O(n) operation, where n is Count.
Applies to
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