DbExpressionBuilder.Union(DbExpression, DbExpression) Method

Reference

Definition

Namespace:: System.Data.Common.CommandTrees.ExpressionBuilder

Assembly:: System.Data.Entity.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Creates a new DbExpression that computes the union of the left and right set arguments with duplicates removed.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbExpression ^ Union(System::Data::Common::CommandTrees::DbExpression ^ left, System::Data::Common::CommandTrees::DbExpression ^ right);

public static System.Data.Common.CommandTrees.DbExpression Union (this System.Data.Common.CommandTrees.DbExpression left, System.Data.Common.CommandTrees.DbExpression right);

static member Union : System.Data.Common.CommandTrees.DbExpression * System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbExpression

<Extension()>
Public Function Union (left As DbExpression, right As DbExpression) As DbExpression

Parameters

left: DbExpression

An expression that defines the left set argument.

right: DbExpression

An expression that defines the right set argument.

Returns

DbExpression

A new DbExpression that computes the union, without duplicates, of the left and right arguments.

Exceptions

ArgumentNullException

left or right is null.

ArgumentException

No common collection result type with an equality-comparable element type exists between left and right.

Applies to