MissingFieldException Class

Imports System.Reflection

Public Class Example
   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Try
         ' Attempt to call a static DoSomething method defined in the Example class.
         ' However, because the Example class does not define this field, 
         ' a MissingFieldException is thrown.
         GetType(Example).InvokeMember("DoSomething", BindingFlags.Static Or BindingFlags.InvokeMethod, _
                                    Nothing, Nothing, Nothing)
      Catch e As MissingMethodException
         ' Show the user that the DoSomething method cannot be called.
         outputBlock.Text += String.Format("Unable to call the DoSomething method: {0}", e.Message) & vbCrLf
      End Try
      Try
         ' Attempt to access a static AField field defined in the Example class.
         ' However, because the Example class does not define this field, 
         ' a MissingFieldException is thrown.
         GetType(Example).InvokeMember("AField", BindingFlags.Static Or BindingFlags.SetField, _
                                    Nothing, Nothing, New [Object]() {5})
      Catch e As MissingFieldException
         ' Show the user that the AField field cannot be accessed.
         outputBlock.Text += String.Format("Unable to access the AField field: {0}", e.Message) & vbCrLf
      End Try
      Try
         ' Attempt to access a static AnotherField field defined in the Example class.
         ' However, because the Example class does not define this field, 
         ' a MissingFieldException is thrown.
         GetType(Example).InvokeMember("AnotherField", BindingFlags.Static Or BindingFlags.GetField, _
                                    Nothing, Nothing, Nothing)
      Catch e As MissingMemberException
         ' Notice that this code is catching MissingMemberException which is the  
         ' base class of MissingMethodException and MissingFieldException.
         ' Show the user that the AnotherField field cannot be accessed.
         outputBlock.Text += String.Format("Unable to access the AnotherField field: {0}", e.Message) & vbCrLf
      End Try
   End Sub
End Class
' This code example produces the following output:
'
' Unable to call the DoSomething method: Method 'App.DoSomething' not found.
' Unable to access the AField field: Field 'App.AField' not found.
' Unable to access the AnotherField field: Field 'App.AnotherField' not found.

using System;
using System.Reflection;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {

      try
      {
         // Attempt to call a static DoSomething method defined in the Example class.
         // However, because the Example class does not define this field, 
         // a MissingFieldException is thrown.
         typeof(Example).InvokeMember("DoSomething", BindingFlags.Static |
             BindingFlags.InvokeMethod, null, null, null);
      }
      catch (MissingMethodException e)
      {
         // Show the user that the DoSomething method cannot be called.
         outputBlock.Text += String.Format("Unable to call the DoSomething method: {0}", e.Message) + "\n";
      }

      try
      {
         // Attempt to access a static AField field defined in the Example class.
         // However, because the Example class does not define this field, 
         // a MissingFieldException is thrown.
         typeof(Example).InvokeMember("AField", BindingFlags.Static | BindingFlags.SetField,
             null, null, new Object[] { 5 });
      }
      catch (MissingFieldException e)
      {
         // Show the user that the AField field cannot be accessed.
         outputBlock.Text += String.Format("Unable to access the AField field: {0}", e.Message) + "\n";
      }

      try
      {
         // Attempt to access a static AnotherField field defined in the Example class.
         // However, because the Example class does not define this field, 
         // a MissingFieldException is thrown.
         typeof(Example).InvokeMember("AnotherField", BindingFlags.Static |
             BindingFlags.GetField, null, null, null);
      }
      catch (MissingMemberException e)
      {
         // Notice that this code is catching MissingMemberException which is the  
         // base class of MissingMethodException and MissingFieldException.
         // Show the user that the AnotherField field cannot be accessed.
         outputBlock.Text += String.Format("Unable to access the AnotherField field: {0}", e.Message) + "\n";
      }
   }
}
// This code example produces the following output:
//
// Unable to call the DoSomething method: Method 'App.DoSomething' not found.
// Unable to access the AField field: Field 'App.AField' not found.
// Unable to access the AnotherField field: Field 'App.AnotherField' not found.