title: FileNotFoundException for mscorlib.XmlSerializers.DLL, which doesn't exist
body: <p>I'm using an XmlSerializer to deserialize a particular type in mscorelib.dll</p>
  
  <pre><code>XmlSerializer ser = new XmlSerializer( typeof( [.Net type in System] ) );
  return ([.Net type in System]) ser.Deserialize( new StringReader( xmlValue ) );
  </code></pre>
  
  <p>This throws a caught <code>FileNotFoundException</code> when the assembly is loaded:</p>
  
  <blockquote>
    <p>"Could not load file or assembly
    'mscorlib.XmlSerializers,
    Version=2.0.0.0, Culture=neutral,
    PublicKeyToken=b77a5c561934e089' or
    one of its dependencies. The system
    cannot find the file specified."</p>
  </blockquote>
  
  <p>FusionLog:</p>
  
  <pre><code>=== Pre-bind state information ===
  LOG: User = ###
  LOG: DisplayName = mscorlib.XmlSerializers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=x86
   (Fully-specified)
  LOG: Appbase = file:///C:/localdir
  LOG: Initial PrivatePath = NULL
  Calling assembly : System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089.
  ===
  LOG: This bind starts in default load context.
  LOG: Using application configuration file: C:\localdir\bin\Debug\appname.vshost.exe.Config
  LOG: Using machine configuration file from c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\config\machine.config.
  LOG: Post-policy reference: mscorlib.XmlSerializers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=x86
  LOG: Attempting download of new URL file:///C:/localdir/bin/Debug/mscorlib.XmlSerializers.DLL.
  LOG: Attempting download of new URL file:///C:/localdir/bin/Debug/mscorlib.XmlSerializers/mscorlib.XmlSerializers.DLL.
  LOG: Attempting download of new URL file:///C:/localdir/bin/Debug/mscorlib.XmlSerializers.EXE.
  LOG: Attempting download of new URL file:///C:/localdir/bin/Debug/mscorlib.XmlSerializers/mscorlib.XmlSerializers.EXE.
  </code></pre>
  
  <p>As far as I know there is no mscorlib.XmlSerializers.DLL, I think the DLL name has bee auto generated by .Net looking for the serializer. </p>
  
  <p>You have the option of creating a myApplication.XmlSerializers.DLL when compiling to optimise serializations, so I assume this is part of the framework's checking for it.</p>
  
  <p>The problem is that this appears to be causing a delay in loading the application - it seems to hang for a few seconds at this point.</p>
  
  <p>Any ideas how to avoid this or speed it up?</p>