title: Edit already-existing ASP.NET web application?
body: <p>Btw, I am quite new to C#, ASP.net, Visual Studio, etc.:</p>
  
  <p>I FTPed into a remote server to get the code for an already-existing, functioning web application. I ran it on a local server quite easily; however, I'm struggling to rebuild the project in VS Express and see changes I make in the C# (an aspx.cs file) code. I build the .csproj file (with and without the changes I make), but I get the following error for BAL, DAL, and BO:</p>
  
  <p>Error   11  The type or namespace name 'DAL' could not be found (are you missing a using directive or an assembly reference?)</p>
  
  <p>They also generate warnings: </p>
  
  <p>Warning 385 The referenced component 'BAL' could not be found.  </p>
  
  <p>BAL.dll, DAL.dll, and BO.dll all exist in the bin folder. When running VS Express, they are in the folder tree under References but have warning signs next to them.</p>
  
  <p>How do I go about testing changes I make to the C# files? Is there an easier way to edit the backend of an already-running .NET app? Should I decompile the project_name.dll, alter it, and recompile it?</p>