Returns a default equality comparer for the type specified by the generic argument.
Assembly: mscorlib (in mscorlib.dll)
The following example creates two dictionary collections of type Box. Both dictionaries are created with the constructor that takes an EqualityComparer(T) as a parameter.
To determine the equality of dictionary keys, the boxesByDim dictionary uses an equality comparer (BoxEqDimensions) that uses the implementation of the IEquatable(T).Equals method in the Box class. Two boxes are considered equal if their dimensions are the same.
The boxesByVol dictionary uses an equality comparer (BoxEqVolume) that defines equality by volume. Two boxes are considered equal if their volumes are the same.
.NET FrameworkSupported in: 4.5.1, 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
.NET for Windows Phone appsSupported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1
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.