title: Suggestions for Localising Exceptions
body: <p>I need to add localization to the exceptions thrown by my application as a lot are ApplicationExceptions and handled and logged to an error report.  Ideally I want to create a new Exception, imheriting from ApplicationException that I can pass the resource key as well as arguments to, so that the exception messsage can be built up from the resource information.  Unfortunately (I think) the only way to set the message in an exception is in the New()...</p>
  
  <p>I would like something like:</p>
  
  <pre><code>public class LocalizedException
      Inherits ApplicationException  
  
  public Sub New(ResourceKey as string, arg0 as Object)
      MyBase.New()
      ' get the localized text'  
      Dim ResMan as New Global.System.Resources.ResourceManager("AppName.ExceptionResources", _
      System.Reflection.Assembly.GetExecutingAssembly)
      Dim LocalText as string = ResMan.GetString(ResourceKey)
      Dim ErrorText as String = ""
      Try
          Dim ErrorText = String.Format(LocalText, arg0)
      Catch
          ErrorText = LocalText + arg0.ToString() ' in case String.Format fails'
      End Try
      ' cannot now set the exception message!'
  End Sub
  End Class
  </code></pre>
  
  <p>However I can only have MyBase.New() as the first line
  Message is ReadOnly</p>
  
  <p>Does anyone have any recommendations as to how to get localised strings into the Exception handler?  I will need this in a few different exceptions, though could go the way of a exceptioncreation function that gets the localised string and creates teh exception, though the stack info would then be wrong.  I also don't want too much in the main body before teh Throw as it obviously starts to impinge on readability of the flow. </p>