Identify Assembly Version with C#

With Assembly, we can get some informations, there are:

• AssemblyTitleAttribute

• AssemblyCompanyAttribute

• AssemblyFileVersionAttribute

• AssemblyProductAttribute

• AssemblyCopyrightAttribute

• AssemblyDescriptionAttribute

• ETC

For completed list, use this:

   1: Assembly executingAssembly = Assembly.GetExecutingAssembly();

   2: object[] customAttributes = executingAssembly.GetCustomAttributes(false);

Below are the sample code, to identify similar DLL but with different version.

   1: Dictionary<string, string> dllFileNames = new Dictionary<string, string>();

   2: string directory = @"D:\Inetpub\wwwroot\Windows.Test\bin";

   3: DirectoryInfo directoryInfo = new DirectoryInfo(directory);

   4: if (directoryInfo != null)

   5: {

   6:     foreach (FileInfo fileInfo in directoryInfo.GetFiles("*.dll", SearchOption.AllDirectories))

   7:     {

   8:         if (!dllFileNames.ContainsKey(fileInfo.Name))

   9:             dllFileNames.Add(fileInfo.Name, fileInfo.FullName);

  10:         else

  11:         {

  12:             int assembly1Version = 0;

  13:             Assembly assembly1 = Assembly.LoadFile(dllFileNames[fileInfo.Name]);

  14:             object[] customAttributes = assembly1.GetCustomAttributes(typeof(AssemblyFileVersionAttribute), false);

  15:             if (customAttributes.Length > 0)

  16:             {

  17:                 string version = ((AssemblyFileVersionAttribute)customAttributes[0]).Version;

  18:                 //Parse string version to int version

  19:                 //  ex: 1.0.0.1 >> 1001

  20:                 assembly1Version = Program.VersionToInt(version);

  21:             }

  22:  

  23:             int assembly2Version = 0;

  24:             Assembly assembly2 = Assembly.LoadFile(fileInfo.FullName);

  25:             customAttributes = assembly2.GetCustomAttributes(typeof(AssemblyFileVersionAttribute), false);

  26:             if (customAttributes.Length > 0)

  27:             {

  28:                 string version = ((AssemblyFileVersionAttribute)customAttributes[0]).Version;

  29:                 //Parse string version to int version

  30:                 //  ex: 1.0.0.1 >> 1001

  31:                 assembly2Version = Program.VersionToInt(version);

  32:             }

  33:  

  34:             if (assembly2Version > assembly1Version)

  35:             {

  36:                 dllFileNames.Remove(fileInfo.Name);

  37:                 dllFileNames.Add(fileInfo.Name, fileInfo.FullName);

  38:             }

  39:         }

  40:     }

  41:  

  42:     foreach (string dllFileName in dllFileNames.Keys)

  43:     {

  44:         string fullName = dllFileNames[dllFileName];

  45:         //Some methods

  46:     }

  47: }

Have fun!