Decompile Precompiled Source Code ASP.NET

we have an application in production and the code is in Pre-Compiled form. The developer who developed that application left the company and we don't have any backup of source code. the only access we have is Pre Compiled code in the server. We need to fix the issues in the application now.

Is there any way to Decompile (extract to actual source code) the PreCompiled code ?

Can you Decompile a DLL?

Such a DLL is compiled to machine language and can only be directly decompiled to assembly language. So, again, it depends on the language used. And the answer might be that it's just not possible to get anything resembling the original source code. Then, as stated, if it's Visual Basic, research p-code decompilers.

Open the DLLs in the .NET Reflector.