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Expression.TypeIs Method

.NET Framework 4

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.

Exceptions

Exception	Condition
ArgumentNullException	expression or type is null.

Remarks

The Type property of the resulting UnaryExpression represents Boolean.

Examples

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)

Version Information

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Platforms

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.

Reference

Expression Class

System.Linq.Expressions Namespace

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