Type.IsValueType Property

Gets a value indicating whether the Type is a value type.

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

Public ReadOnly Property IsValueType As Boolean

Property Value

Type: System.Boolean
true if the Type is a value type; otherwise, false.

Value types are types that are represented as sequences of bits; value types are not classes or interfaces. Value types are referred to as "structs" in some programming languages. Enums are a special case of value types.

This property returns false for the ValueType class, because ValueType is not a value type itself. It is the base class for all value types, and therefore any value type can be assigned to it. This would not be possible if ValueType itself was a value type. Value types are boxed when they are assigned to a field of type ValueType.

This property returns true for enumerations, but not for the Enum type itself. For an example that demonstrates this behavior, see IsEnum.

This property is read-only.

The following example creates a variable of type MyEnum, checks for the IsValueType property, and displays the result.

Public Class Example

    ' Declare an enum type.
    Enum MyEnum
    End Enum 'MyEnum

    Public Overloads Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)

        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
        outputBlock.Text += String.Format("Is {0} a value type? {1}." & vbLf, _
            myType.FullName, myBool)
    End Sub 
End Class 


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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