When overridden in a derived class, performs a comparison of two objects of the same type and returns a value indicating whether one object is less than, equal to, or greater than the other.
Assemblies: System.Collections (in System.Collections.dll)
mscorlib (in mscorlib.dll)
Return ValueType: System.Int32
A signed integer that indicates the relative values of x and y, as shown in the following table.
Less than zero
x is less than y.
x equals y.
Greater than zero
x is greater than y.
Implement this method to provide a customized sort order comparison for type T.Notes to Implementers
Comparing a null reference (Nothing in Visual Basic) with any reference type is allowed and does not generate an exception. A null reference is considered to be less than any reference that is not null.
For information on culture-specific comparisons, see the System.Globalization namespace and Globalizing and Localizing .NET Framework Applications.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: 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.