Expression.TypeIs Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Creates a TypeBinaryExpression.
Assembly: System.Core (in System.Core.dll)
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.TypeBinaryExpressionA TypeBinaryExpression for which the NodeType property is equal to TypeIs and for which the Expression and TypeOperand properties are set to the specified values.
| Exception | Condition |
|---|---|
| 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)); outputBlock.Text += typeBinaryExpression.ToString() + "\n"; // This code produces the following output: // // ("spruce" Is Int32)
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