Fuslogvw.exe,a tool to analyze the resource loading process

Use it you can easily identify if an assembly has been loaded.

 The Assembly Binding Log Viewer (Fuslogvw.exe) helps to analyze the resource loading process. Detailed resource binding information is actually maintained on a per URL basis by the WinInet component of Windows. Unfortunately, when WinInet returns those entries they are not necessarily in chronological order.

Source: .NET 1.1 Framework Help