Type.IsValueType Property
Gets a value indicating whether the Type is a value type.
[Visual Basic] Public ReadOnly Property IsValueType As Boolean [C#] public bool IsValueType {get;} [C++] public: __property bool get_IsValueType(); [JScript] public function get IsValueType() : Boolean;
Property Value
true if the Type is a value type; otherwise, false.
Remarks
Value types are those that are represented as sequences of bits; value types are not classes or interfaces. These are referred to as "structs" in some programming languages. Enums are a special case of value types.
This property returns true for enumerations, but not for the Enum type itself, which is a class. For an example that demonstrates this behavior, see IsEnum.
This property is read-only.
Example
[Visual Basic, C#, C++] The following example creates a variable of type MyEnum, checks for the IsValueType property, and displays the result.
[Visual Basic] Imports System Imports Microsoft.VisualBasic Namespace SystemType Public Class [MyClass] ' Declare an enum type. Enum MyEnum One Two End Enum 'MyEnum Public Overloads Shared Sub Main() Try Dim myBool As Boolean = False Dim myTestEnum As MyEnum = MyEnum.One ' Get the type of myTestEnum. Dim myType As Type = myTestEnum.GetType() ' Get the IsValueType property of the myTestEnum variable. myBool = myType.IsValueType Console.WriteLine(ControlChars.Cr + "Is {0} a value type? {1}.", myType.FullName, myBool.ToString()) Catch e As Exception Console.WriteLine(ControlChars.Cr + "An exception occurred: {0}", e.Message.ToString()) End Try End Sub 'Main End Class '[MyClass] End Namespace 'SystemType [C#] using System; namespace SystemType { public class MyClass { // Declare an enum type. enum MyEnum { One, Two } public static void Main(string []args) { try { bool myBool = false; MyEnum myTestEnum = MyEnum.One; // Get the type of myTestEnum. Type myType = myTestEnum.GetType(); // Get the IsValueType property of the myTestEnum // variable. myBool = myType.IsValueType; Console.WriteLine("\nIs {0} a value type? {1}.", myType.FullName, myBool.ToString()); } catch (Exception e) { Console.WriteLine("\nAn exception occurred: {0}", e.Message); } } } } [C++] #using <mscorlib.dll> using namespace System; // Declare an enum type. __value enum MyEnum { One, Two }; int main() { try { bool myBool = false; MyEnum myTestEnum = MyEnum::One; // Get the type of myTestEnum. Type* myType = __box(myTestEnum)->GetType(); // Get the IsValueType property of the myTestEnum // variable. myBool = myType->IsValueType; Console::WriteLine(S"\nIs {0} a value type? {1}.", myType->FullName, __box( myBool)); } catch (Exception* e) { Console::WriteLine(S"\nAn exception occurred: {0}", e->Message); } }
[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button
in the upper-left corner of the page.
Requirements
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard
See Also
Type Class | Type Members | System Namespace | TypeAttributes | IsClass | IsInterface | ValueType | IsValueTypeImpl | TypeAttributes | IsClass | IsInterface | ValueType | IsValueTypeImpl