Defines a generalized type-specific comparison method that a value type or class implements to order or sort its instances.
Assembly: mscorlib (in mscorlib.dll)
Thetype exposes the following members.
This interface is implemented by types whose values can be ordered or sorted. It requires that implementing types define a single method, CompareTo(Object), that indicates whether the position of the current instance in the sort order is before, after, or the same as a second object of the same type. The instance's implementation is called automatically by methods such as Array.Sort and ArrayList.Sort.
Less than zero
The current instance precedes the object specified by the CompareTo method in the sort order.
This current instance occurs in the same position in the sort order as the object specified by the CompareTo method.
Greater than zero
This current instance follows the object specified by the CompareTo method in the sort order.
All numeric types (such as Int32 and Double) implement , as do String, Char, and DateTime. Custom types should also provide their own implementation of to enable object instances to be ordered or sorted.
.NET FrameworkSupported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
.NET for Windows Phone appsSupported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
Windows Phone 8.1, Windows Phone 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.