FieldInfo.IsFamilyAndAssembly Property
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Gets a value that indicates whether the visibility of this field is described by FieldAttributes.FamANDAssem; that is, the field can be accessed from derived classes, but only if they are in the same assembly.
Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public ReadOnly Property IsFamilyAndAssembly As Boolean
public bool IsFamilyAndAssembly { get; }
Property Value
Type: System.Boolean
true if access to this field is exactly described by FieldAttributes.FamANDAssem; otherwise, false.
Exceptions
Exception | Condition |
---|---|
MethodAccessException | This member is invoked late-bound through mechanisms such as Type.InvokeMember. |
Remarks
If a field has FamANDAssem level visibility, it can be called from any member in a derived class that is also in the same assembly, but not from any other type.
The visibility of a field is exactly described by FieldAttributes.FamANDAssem if the visibility modifier is protected private in C++. Fields with this visibility cannot be defined in Visual Basic or C#.
Examples
The following example defines fields with varying levels of visibility, and displays the values of their IsAssembly, IsFamily, IsFamilyOrAssembly, and IsFamilyAndAssembly properties.
Note: |
---|
The Visual Basic and C# languages cannot define fields with FieldAttributes.FamANDAssem visibility. |
To run this example, see Building Examples That Use a Demo Method and a TextBlock Control.
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
using System;
using System.Reflection;
public class Example
{
public int f_public;
internal int f_internal;
protected int f_protected;
protected internal int f_protected_public;
public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
outputBlock.FontFamily = new System.Windows.Media.FontFamily("Courier New");
outputBlock.Text += String.Format("\n{0,-30}{1,-18}{2}", "", "IsAssembly", "IsFamilyOrAssembly") + "\n";
outputBlock.Text += String.Format("{0,-21}{1,-18}{2,-18}{3}\n",
"", "IsPublic", "IsFamily", "IsFamilyAndAssembly") + "\n";
foreach (FieldInfo f in typeof(Example).GetFields(
BindingFlags.Instance | BindingFlags.NonPublic | 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
) + "\n";
}
}
}
/* This code example produces output similar to the following:
IsAssembly IsFamilyOrAssembly
IsPublic IsFamily IsFamilyAndAssembly
f_public True False False False False
f_internal False True False False False
f_protected False False True False False
f_protected_public False False False True False
*/
Version Information
Silverlight
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
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
See Also