Type.IsVisible Property

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

Gets a value indicating whether the Type can be accessed by code outside the assembly.

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

Syntax

Public ReadOnly Property IsVisible As Boolean
public bool IsVisible { get; }

Property Value

Type: System..::.Boolean
true if the current Type is a public type or a public nested type such that all the enclosing types are public; otherwise, false.

Remarks

Use this property to determine whether a type is part of the public interface of a component assembly.

Examples

The following code example tests two classes, only one of which is visible outside the assembly.


Friend Class InternalOnly
   Public Class Nested
   End Class
End Class

Public Class Example
   Public Class Nested
   End Class

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      With GetType(InternalOnly.Nested)
         outputBlock.Text &= "Is the " & .FullName _
             & " class visible outside the assembly? " & .IsVisible & vbCrLf
      End With

      With GetType(Example.Nested)
         outputBlock.Text &= "Is the " & .FullName _
             & " class visible outside the assembly? " & .IsVisible & vbCrLf
      End With
   End Sub
End Class

' This example produces the following output:
'
'Is the InternalOnly+Nested class visible outside the assembly? False
'Is the Example+Nested class visible outside the assembly? True
using System;

internal class InternalOnly
{
   public class Nested { }
}

public class Example
{
   public class Nested { }

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      Type t = typeof(InternalOnly.Nested);
      outputBlock.Text += String.Format(
          "Is the {0} class visible outside the assembly? {1}",
          t.FullName,
          t.IsVisible
      ) + "\n";

      t = typeof(Example.Nested);
      outputBlock.Text += String.Format(
          "Is the {0} class visible outside the assembly? {1}",
          t.FullName,
          t.IsVisible
      ) + "\n";
   }
}

/* This example produces the following output:

Is the InternalOnly+Nested class visible outside the assembly? False
Is the Example+Nested class visible outside the assembly? True
 */

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

See Also

Reference

Type Class

System Namespace