Have you ever come across an assembly file you wanted to know as much as possible about, without running it? Have you ever had problems with deployment, because you weren't sure what version of a DLL you copied on a machine? How do you tell the difference between a 32 bit and 64 bit assembly anyway?

I created a little command line tool, which dumps a lot of information about an assembly. For example, here is the output of the tool when run against itself:

AssemblyInfo (c) 2007 Kris Vandermotten 

File: 

 AssemblyInfo.exe 

COFF Header: 

 File is executable (EXE). 

 File is 32 bit. 

 Target machine:     I386 

PE Header: 

 File is a 32 bit PE file. 

 Linker Version:     8.0 

 Image Base Address: 0x00400000 

 Section Alignment:  8192 

 File Alignment:     4096 

 OS Version:         4.0 

 Image Version:      0.0 

 Subsystem Version:  4.0 

 Subsystem:          WINDOWS_CUI 

Version information: 

 File Version:       1.0.0.0 

 Product Version:    1.0.0.0 

 Language: Language Neutral, Codepage 1200 

  OriginalFilename:  AssemblyInfo.exe 

  FileDescription: 

  AssemblyInfo 

  FileVersion:       1.0.0.0 

  InternalName:      AssemblyInfo.exe 

  CompanyName:       Kris Vandermotten 

  LegalCopyright:    Copyright (c) 2007 Kris Vandermotten 

  LegalTrademarks: 

  ProductName:       AssemblyInfo 

  ProductVersion:    1.0.0.0 

  PrivateBuild: 

  SpecialBuild: 

  Comments: 

Assembly: 

 Name:               AssemblyInfo, Version=1.0.0.0, Culture=neutral, PublicKeyToken=e56d967875f629d3 

 Hash Algorithm:     SHA1 

 Processor:          MSIL 

 Runtime Version:    v2.0.50727 

 EntryPoint:         Void Main(System.String[]) in AssemblyInfo.Program

 Modules: 

 AssemblyInfo.exe 

  PE Kind:           ILOnly 

  Machine:           I386 

  X509 Certificate:  none 

Referenced Assemblies: 

 mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 

Assembly Attributes: 

 [System.Reflection.AssemblyProductAttribute("AssemblyInfo")] 

 [System.Runtime.CompilerServices.RuntimeCompatibilityAttribute(WrapNonExceptionThrows = True)] 

 [System.Runtime.InteropServices.GuidAttribute("5eb90c8e-1aa6-4739-917e-0d4117b78ba9")] 

 [System.CLSCompliantAttribute((Boolean)True)] 

 [System.Runtime.InteropServices.ComVisibleAttribute((Boolean)False)] 

 [System.Reflection.AssemblyTrademarkAttribute("")] 

 [System.Reflection.AssemblyCopyrightAttribute("Copyright (c) 2007 Kris Vandermotten")] 

 [System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")] 

 [System.Reflection.AssemblyCompanyAttribute("Kris Vandermotten")] 

 [System.Reflection.AssemblyConfigurationAttribute("")] 

 [System.Reflection.AssemblyDescriptionAttribute("")] 

 [System.Reflection.AssemblyTitleAttribute("AssemblyInfo")] 

 [System.Diagnostics.DebuggableAttribute((System.Diagnostics.DebuggableAttribute+DebuggingModes)2)] 

 [System.Runtime.CompilerServices.CompilationRelaxationsAttribute((Int32)8)]

Download AssemblyInfo and enjoy.