Collection(Of T).IList.IndexOf Method
Determines the index of a specific item in the IList.
Namespace: System.Collections.ObjectModel
Assembly: mscorlib (in mscorlib.dll)
'Declaration Private Function IndexOf ( _ value As Object _ ) As Integer Implements IList.IndexOf
Parameters
- value
- Type: System.Object
Implements
IList.IndexOf(Object)| Exception | Condition |
|---|---|
| ArgumentException | value is of a type that is not assignable to the IList. |
This method determines equality using the default comparer Comparer(Of T).Default. Comparer(Of T).Default checks whether type T implements System.IComparable(Of T) and uses that implementation, if available. If not, Comparer(Of T).Default checks whether type T implements System.IComparable. If type T does not implement either interface, this method uses Object.Equals.
This method is an O(n) operation, where n is Count.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
