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TypedTableBaseExtensions.OrderByDescending<TRow, TKey> Method (TypedTableBase<TRow>, Func<TRow, TKey>, IComparer<TKey>)

Sorts the rows of a TypedTableBase<T> in descending order according to the specified key and comparer.

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

public static OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(
	this TypedTableBase<TRow> source,
	Func<TRow, TKey> keySelector,
	IComparer<TKey> comparer
)
where TRow : DataRow

Type Parameters

TRow

The type of the row elements in source, typically DataRow.

TKey

The type of the key returned by keySelector.

Parameters

source
Type: System.Data.TypedTableBase<TRow>
A TypedTableBase<T> that contains the DataRow elements to be ordered.
keySelector
Type: System.Func<TRow, TKey>
A function to extract a key from an element.
comparer
Type: System.Collections.Generic.IComparer<TKey>
An IComparer<T> to compare keys.

Return Value

Type: System.Data.OrderedEnumerableRowCollection<TRow>
An OrderedEnumerableRowCollection<TRow> whose elements are sorted by the specified key and comparer.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type TypedTableBase<TRow>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

.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.

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