Determines whether an element is in the List(T).
Assemblies: mscorlib (in mscorlib.dll)
System.Collections (in System.Collections.dll)
The following example contains a list of complex objects of type Box. The Box class implements the IEquatable(T).Equals method so that two boxes are considered equal if their dimensions are the same. In this example, the method returns true, because a box that has the specified dimensions is already in the collection.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
XNA FrameworkSupported in: 3.0, 2.0, 1.0
Portable Class LibrarySupported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8