IsClass Property

Type.IsClass Property


Gets a value indicating whether the Type is a class or a delegate; that is, not a value type or interface.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

public bool IsClass { get; }

Property Value

Type: System.Boolean

true if the Type is a class; otherwise, false.



This property returns true for classes as well as delegates. It returns false for value types (for structures and enumerations) even if they are boxed.

If the currentType represents a type parameter in the definition of a generic type or generic method, this property always returns true.If the current Type represents a constructed generic type, this property returns true if the generic type definition is a class definition; that is, it does not define an interface or a value type.


This property returns true for Type instances that represent the Enum and ValueType classes. These two classes are the base types for enumerations and value types, respectively, but they are not enumerations or value types themselves. For more information, see the IsValueTypeand IsEnum properties.

The TypeAttributes.ClassSemanticsMaskenumeration value distinguishes a type declaration as class or interface.However, both classes and value types are marked with the TypeAttributes.Class attribute. If you retrieve the value of a type's Attributes property and use the TypeAttributes.ClassSemanticsMask value to determine whether a type is a class instead of a value type, you must also call the IsValueType property. The example for the TypeAttributes enumeration contains additional information as well as anexample.

This property is read-only.

The following example creates an instance of a type and indicates whether the type is a class.

using System;
using System.Reflection;

public  class MyDemoClass

public class MyTypeClass
    public static void Main(string[] args)
            Type  myType = typeof(MyDemoClass);
            // Get and display the 'IsClass' property of the 'MyDemoClass' instance.
            Console.WriteLine("\nIs the specified type a class? {0}.", myType.IsClass); 
        catch(Exception e)
            Console.WriteLine("\nAn exception occurred: {0}." ,e.Message);

.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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