Expression.TypeIs Method

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

public static TypeBinaryExpression TypeIs(
	Expression expression,
	Type type
)

Parameters

expression
Type: System.Linq.Expressions.Expression

An Expression to set the Expression property equal to.

type
Type: System.Type

A Type to set the TypeOperand property equal to.

Return Value

Type: System.Linq.Expressions.TypeBinaryExpression
A TypeBinaryExpression for which the NodeType property is equal to TypeIs and for which the Expression and TypeOperand properties are set to the specified values.

ExceptionCondition
ArgumentNullException

expression or type is null.

The Type property of the resulting UnaryExpression represents Boolean.

The following example demonstrates how to use the TypeIs(Expression, Type) method to create a TypeBinaryExpression that represents a type test of a string value against the Int32 type.

// Create a TypeBinaryExpression that represents a 
// type test of the string "spruce" against the 'int' type.
System.Linq.Expressions.TypeBinaryExpression typeBinaryExpression =
    System.Linq.Expressions.Expression.TypeIs(
        System.Linq.Expressions.Expression.Constant("spruce"),
        typeof(int));

Console.WriteLine(typeBinaryExpression.ToString());

// This code produces the following output: 
// 
// ("spruce" Is Int32)

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5
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