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Expression.Condition Method (Expression, Expression, Expression, Type)

Creates a ConditionalExpression that represents a conditional statement.

Namespace:  System.Linq.Expressions
Assembly:  System.Core (in System.Core.dll)

public static ConditionalExpression Condition(
	Expression test,
	Expression ifTrue,
	Expression ifFalse,
	Type type
)

Parameters

test
Type: System.Linq.Expressions.Expression

An Expression to set the Test property equal to.

ifTrue
Type: System.Linq.Expressions.Expression

An Expression to set the IfTrue property equal to.

ifFalse
Type: System.Linq.Expressions.Expression

An Expression to set the IfFalse property equal to.

type
Type: System.Type

A Type to set the Type property equal to.

Return Value

Type: System.Linq.Expressions.ConditionalExpression
A ConditionalExpression that has the NodeType property equal to Conditional and the Test, IfTrue, and IfFalse properties set to the specified values.

This method allows explicitly unifying the result type of the conditional expression in cases where the types of ifTrue and ifFalse expressions are not equal. Types of both ifTrue and ifFalse must be implicitly reference assignable to the result type. The type is allowed to be Void.

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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