IsFamily Property

FieldInfo.IsFamily Property

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Gets a value that indicates whether the visibility of this field is described by FieldAttributes.Family; that is, the field is visible only within its class and derived classes.

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

'Declaration
Public ReadOnly Property IsFamily As Boolean

Property Value

Type: System.Boolean
true if access to this field is exactly described by FieldAttributes.Family; otherwise, false.

ExceptionCondition
MethodAccessException

This member is invoked late-bound through mechanisms such as Type.InvokeMember.

The visibility of a field is exactly described by FieldAttributes.Family if the only visibility modifier is protected. This property is false for fields that are protected internal in C# (Protected Friend in Visual Basic, protected public in C++); use the IsFamilyOrAssembly property to identify such fields.

The following example defines fields with varying levels of visibility, and displays the values of their IsAssembly, IsFamily, IsFamilyOrAssembly, and IsFamilyAndAssembly properties.

NoteNote:

The Visual Basic and C# languages cannot define fields with FieldAttributes.FamANDAssem visibility.

To run this example, see Building examples that have static TextBlock controls for Windows Phone 8.


Imports System.Reflection

Public Class Example

   Public f_Public As Integer
   Friend f_Friend As Integer
   Protected f_Protected As Integer
   Protected Friend f_Protected_Friend As Integer

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

      outputBlock.FontFamily = New FontFamily("Courier New")
      outputBlock.Text &= String.Format(vbCrLf & _
          "{0,-30}{1,-18}{2}", "", "IsAssembly", "IsFamilyOrAssembly") & vbCrLf
      outputBlock.Text &= String.Format("{0,-21}{1,-18}{2,-18}{3}" & vbCrLf, _
          "", "IsPublic", "IsFamily", "IsFamilyAndAssembly") & vbCrLf

      For Each f As FieldInfo In GetType(Example).GetFields( _
          BindingFlags.Instance Or BindingFlags.NonPublic Or BindingFlags.Public)

         outputBlock.Text &= String.Format("{0,-21}{1,-9}{2,-9}{3,-9}{4,-9}{5,-9}", _
             f.Name, _
             f.IsPublic, _
             f.IsAssembly, _
             f.IsFamily, _
             f.IsFamilyOrAssembly, _
             f.IsFamilyAndAssembly _
         ) & vbCrLf
      Next
   End Sub
End Class

' This code example produces output similar to the following:
'
'                              IsAssembly        IsFamilyOrAssembly
'                     IsPublic          IsFamily          IsFamilyAndAssembly
'
'f_Public             True     False    False    False    False
'f_Friend             False    True     False    False    False
'f_Protected          False    False    True     False    False
'f_Protected_Friend   False    False    False    True     False


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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