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DataRowComparer<TRow> Class

Compares two DataRow objects for equivalence by using value-based comparison.


Namespace:  System.Data
Assembly:  System.Data.DataSetExtensions (in System.Data.DataSetExtensions.dll)

generic<typename TRow>
where TRow : DataRow
public ref class DataRowComparer sealed : IEqualityComparer<TRow>

Type Parameters


The type of objects to be compared, typically DataRow.

The DataRowComparer<TRow> type exposes the following members.

Public propertyStatic memberDefaultGets a singleton instance of DataRowComparer<TRow>. This property is read-only.

Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Public methodEquals(TRow, TRow)Compares two DataRow objects by using a column-by-column, value-based comparison.
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCode()Serves as a hash function for a particular type. (Inherited from Object.)
Public methodGetHashCode(TRow)Returns a hash code for the specified DataRow object.
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

This class implements the IEqualityComparer<T> interface and uses value-based semantics to compare DataRow objects. This class is required because the default implementations of some set-based operations (such as Distinct, Union, Intersect, and Except) use reference-based semantics to compare DataRow object references, instead of comparing the DataRow object values. The Default class is used to compare the values of the DataRow objects and does not compare the object references.

This class cannot be directly instantiated. Instead, the Default property must be used to return a singleton instance of the Default class.

This class is stateless.

This class is sealed and cannot be derived from.

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.