Determines whether an object is an item in the list.
Although the implementation is dependent on the underlying list's
method, typically the following characteristics apply: Contains is searched starting at the first element and ending at the last element. List
The underlying method performs a linear search; therefore, the average execution time is proportional to the value of the
The underlying method determines equality by calling the
method. Equals .NET Framework
Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1
Windows 8.1, Windows Server 2012 R2, 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.
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