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[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]
Defines methods to support the comparison of objects for equality.
Namespace: System.Collections
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Interface IEqualityComparer
public interface IEqualityComparer
public interface class IEqualityComparer
type IEqualityComparer = interface end
public interface IEqualityComparer
The IEqualityComparer type exposes the following members.
Methods
| Name | Description | |
|---|---|---|
.gif "Public method") |
Equals | Determines whether the specified objects are equal. |
|
GetHashCode | Returns a hash code for the specified object. |
Top
Remarks
This interface allows the implementation of customized equality comparison for collections. That is, you can create your own definition of equality, and specify that this definition be used with a collection type that accepts the IEqualityComparer interface. In the .NET Framework, constructors of the Hashtable, NameValueCollection, and OrderedDictionary collection types accept this interface.
This interface supports only equality comparisons. Customization of comparisons for sorting and ordering is provided by the IComparer interface.