When a .NET application fails in production the developer is often left with just a memory dump. Since Visual Studio cannot handle dumps, you have to instead look at a tool called WinDbg. This is often used with SOS.dll or Psscor4.dll, which are extensions that expose .NET specific details. Though powerful, these can be difficult to use so developers occasionally create their own extensions. Once such developer is Rodney Viana, who has just released netext 1.6.1 as an open source project.