< T > .ICollection < T > .Add Method
is less than Count , this method is an O(1) operation. If the capacity must be increased to accommodate the new element, this method becomes an O( Capacity n) operation, where n is . Count .NET Framework
Supported in: 4.5, 4, 3.5
.NET Framework Client Profile
Supported in: 4, 3.5 SP1
Portable Class Library
Supported in: Portable Class Library
.NET for Windows Store apps
Supported in: Windows 8
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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