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DbExpressionBuilder.Deref Method

.NET Framework 4.6 and 4.5

Creates a new DbDerefExpression that retrieves a specific Entity given a reference expression.

Namespace:  System.Data.Common.CommandTrees.ExpressionBuilder
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public static DbDerefExpression Deref(
	this DbExpression argument
)

Parameters

argument
Type: System.Data.Common.CommandTrees.DbExpression

An DbExpression that provides the reference. This expression must have a reference Type.

Return Value

Type: System.Data.Common.CommandTrees.DbDerefExpression
A new DbDerefExpression that retrieves the specified Entity.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type DbExpression. 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).

ExceptionCondition
ArgumentNullException

argument is null.

ArgumentException

argument does not have a reference result type.

.NET Framework

Supported in: 4.6, 4.5
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