How do I get the path of the assembly the code is in

Question

Is there a way to get the path for the assembly in which the current code resides   I do not want the path of the calling assembly  just the one containing the code    Basically my unit test needs to read some xml test files which are located relative to the  dll   I want the path to always resolve correctly regardless of whether the testing dll is run from TestDriven NET  the MbUnit GUI or something else   Edit  People seem to be misunderstanding what I m asking   My test library is located in say      C  projects myapplication daotests bin Debug daotests dll   and I would like to get this path      C  projects myapplication daotests bin Debug    The three suggestions so far fail me when I run from the MbUnit Gui    Environment CurrentDirectory gives c  Program Files MbUnit System Reflection Assembly GetAssembly typeof DaoTests   Location gives C  Documents and Settings george Local Settings Temp       DaoTests dll System Reflection Assembly GetExecutingAssembly   Location gives the same as the previous

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You can get the bin path by     AppDomain CurrentDomain RelativeSearchPath

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I suspect that the real issue here is that your test runner is copying your assembly to a different location   There s no way at runtime to tell where the assembly was copied from  but you can probably flip a switch to tell the test runner to run the assembly from where it is and not to copy it to a shadow directory   Such a switch is likely to be different for each test runner  of course   Have you considered embedding your XML data as resources inside your test assembly

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I believe this would work for any kind of application   AppDomain CurrentDomain RelativeSearchPath    AppDomain CurrentDomain BaseDirectory

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It s as simple as this   var dir   AppDomain CurrentDomain BaseDirectory

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What about this   System IO Path GetDirectoryName System Reflection Assembly GetExecutingAssembly   Location

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The current directory where you exist   Environment CurrentDirectory      This is the current directory of your application   If you copy the  xml file out with build you should find it   or  System Reflection Assembly assembly   System Reflection Assembly GetAssembly typeof SomeObject        The location of the Assembly assembly Location

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This is what I came up with  In between web projects  unit tests  nunit and resharper test runner   I found this worked for me   I have been looking for code to detect what configuration the build is in  Debug Release CustomName  Alas  the  if DEBUG  So if someone can improve that   Feel free to edit and improve   Getting app folder  Useful for web roots  unittests to get the folder of test files   public static string AppPath       get               DirectoryInfo appPath   new DirectoryInfo AppDomain CurrentDomain BaseDirectory            while  appPath FullName Contains    bin    StringComparison CurrentCultureIgnoreCase                     appPath FullName EndsWith    bin   StringComparison CurrentCultureIgnoreCase                         appPath   appPath Parent                    return appPath FullName            Getting bin folder  Useful for executing assemblies using reflection  If files are copied there due to build properties    public static string BinPath       get               string binPath   AppDomain CurrentDomain BaseDirectory           if   binPath Contains    bin    StringComparison CurrentCultureIgnoreCase               amp  amp   binPath EndsWith    bin   StringComparison CurrentCultureIgnoreCase                         binPath   Path Combine binPath   bin                  -- Please improve this if there is a better way               -- Also note that apps like webapps do not have a debug or release folder  So we would just return bin   if DEBUG             if  Directory Exists Path Combine binPath   Debug                              binPath   Path Combine binPath   Debug     else             if  Directory Exists Path Combine binPath   Release                              binPath   Path Combine binPath   Release     endif                       return binPath

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As far as I can tell  most of the other answers have a few problems   The correct way to do this for a disk-based  as opposed to web-based   non-GACed assembly is to use the currently executing assembly s CodeBase property   This returns a URL  file      Instead of messing around with string manipulation or UnescapeDataString  this can be converted with minimal fuss by leveraging the LocalPath property of Uri    var codeBaseUrl   Assembly GetExecutingAssembly   CodeBase  var filePathToCodeBase   new Uri codeBaseUrl  LocalPath  var directoryPath   Path GetDirectoryName filePathToCodeBase

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This should work   ExeConfigurationFileMap fileMap   new ExeConfigurationFileMap    Assembly asm   Assembly GetCallingAssembly    String path   Path GetDirectoryName new Uri asm EscapedCodeBase  LocalPath    string strLog4NetConfigPath   System IO Path Combine path   log4net config      I am using this to deploy DLL file libraries along with some configuration file  this is to use log4net from within the DLL file

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For ASP Net  it doesn t work  I found a better covered solution at Why AppDomain CurrentDomain BaseDirectory not contains  quot bin quot  in asp net app   It works for both Win Application and ASP Net Web Application  public string ApplicationPath               get                       if  String IsNullOrEmpty AppDomain CurrentDomain RelativeSearchPath                                 return AppDomain CurrentDomain BaseDirectory    exe folder for WinForms  Consoles  Windows Services                           else                               return AppDomain CurrentDomain RelativeSearchPath    bin folder for Web Apps

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Starting with  net framework 4 6    net core 1 0  there is now a AppContext BaseDirectory  which should give the same result as AppDomain CurrentDomain BaseDirectory  except that AppDomains were not part of the  net core 1 x   net standard 1 x API  AppContext BaseDirectory

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AppDomain CurrentDomain BaseDirectory   works with MbUnit GUI

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The only solution that worked for me when using CodeBase and UNC Network shares was   System IO Path GetDirectoryName new System Uri System Reflection Assembly GetExecutingAssembly   CodeBase  LocalPath     It also works with normal URIs too

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All of the proposed answers work when the developer can change the code to include the required snippet  but if you wanted to do this without changing any code you could use Process Explorer    It will list all executing dlls on the system  you may need to determine the process id of your running application  but that is usually not too difficult    I ve written a full description of how do this for a dll inside II - http   nodogmablog bryanhogan net 2016 09 locating-and-checking-an-executing-dll-on-a-running-web-server

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in a windows form app  you can simply use Application StartupPath  but for DLLs and console apps the code is much harder to remember     string slash   Path DirectorySeparatorChar ToString    string root   Path GetDirectoryName System Reflection Assembly GetExecutingAssembly   Location    root    slash  string settingsIni   root    settings ini

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I use this to get the path to the Bin Directory   var i   Environment CurrentDirectory LastIndexOf        var path   Environment CurrentDirectory Substring 0 i      You get this result       c  users ricooley documents visual studio   2010 Projects Windows Test Project Windows Test Project bin

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Does this help     get the full location of the assembly with DaoTests in it string fullPath   System Reflection Assembly GetAssembly typeof DaoTests   Location     get the folder that s in string theDirectory   Path GetDirectoryName  fullPath

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Web application   Server MapPath    MyDir MyFile ext

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Same as John s answer  but a slightly less verbose extension method   public static string GetDirectoryPath this Assembly assembly        string filePath   new Uri assembly CodeBase  LocalPath      return Path GetDirectoryName filePath                   Now you can do   var localDir   Assembly GetExecutingAssembly   GetDirectoryPath      or if you prefer   var localDir   typeof DaoTests  Assembly GetDirectoryPath

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I got the same behaviour in the NUnit in the past  By default NUnit copies your assembly into the temp directory  You can change this behaviour in the NUnit settings     Maybe TestDriven NET and MbUnit GUI have the same settings

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string path   Path GetDirectoryName typeof DaoTests  Module FullyQualifiedName

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I find my solution adequate for the retrieval of the location   var executingAssembly   new FileInfo  Assembly GetExecutingAssembly   Location   Directory FullName

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var assembly   System Reflection Assembly GetExecutingAssembly    var assemblyPath   assembly GetFiles   0  Name  var assemblyDir   System IO Path GetDirectoryName assemblyPath

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I ve been using Assembly CodeBase instead of Location   Assembly a  a   Assembly GetAssembly typeof DaoTests    string s   a CodeBase ToUpper       file    c  path name dll Assert AreEqual true  s StartsWith  FILE        CodeBase is     s   s   s Substring 7  s LastIndexOf      - 7      7    file     while  s StartsWith             s   s Substring 1  s Length - 1     s   s Replace               It s been working  but I m no longer sure it is 100  correct  The page at http   blogs msdn com suzcook archive 2003 06 26 assembly-codebase-vs-assembly-location aspx says    The CodeBase is a URL to the place where the file was found  while the Location is the path where it was actually loaded  For example  if the assembly was downloaded from the internet  its CodeBase may start with  http      but its Location may start with  C     If the file was shadow-copied  the Location would be the path to the copy of the file in the shadow copy dir  It   s also good to know that the CodeBase is not guaranteed to be set for assemblies in the GAC  Location will always be set for assemblies loaded from disk  however    You may want to use CodeBase instead of Location

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I ve defined the following property as we use this often in unit testing    public static string AssemblyDirectory       get               string codeBase   Assembly GetExecutingAssembly   CodeBase          UriBuilder uri   new UriBuilder codeBase           string path   Uri UnescapeDataString uri Path           return Path GetDirectoryName path             The Assembly Location property sometimes gives you some funny results when using NUnit  where assemblies run from a temporary folder   so I prefer to use CodeBase which gives you the path in URI format  then UriBuild UnescapeDataString removes the File    at the beginning  and GetDirectoryName changes it to the normal windows format

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This should work  unless the assembly is shadow copied   string path   System Reflection Assembly GetExecutingAssembly   Location

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In all these years  nobody has actually mentioned this one  A trick I learned from the awesome ApprovalTests project  The trick is that you use the debugging information in the assembly to find the original directory   This will not work in RELEASE mode  nor with optimizations enabled  nor on a machine different from the one it was compiled on   But this will get you paths that are relative to the location of the source code file you call it from  public static class PathUtilities       public static string GetAdjacentFile string relativePath                return GetDirectoryForCaller 1    relativePath            public static string GetDirectoryForCaller                 return GetDirectoryForCaller 1               public static string GetDirectoryForCaller int callerStackDepth                var stackFrame   new StackTrace true  GetFrame callerStackDepth   1           return GetDirectoryForStackFrame stackFrame              public static string GetDirectoryForStackFrame StackFrame stackFrame                return new FileInfo stackFrame GetFileName    Directory FullName   Path DirectorySeparatorChar

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You will get incorrect directory if a path contains the     symbol  So I use a modification of the John Sibly answer that is combination UriBuilder Path and UriBuilder Fragment   public static string AssemblyDirectory       get               string codeBase   Assembly GetExecutingAssembly   CodeBase          UriBuilder uri   new UriBuilder codeBase             modification of the John Sibly answer             string path   Uri UnescapeDataString uri Path Replace                         uri Fragment Replace                      return Path GetDirectoryName path

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Here is a VB NET port of John Sibly s code  Visual Basic is not case sensitive  so a couple of his variable names were colliding with type names   Public Shared ReadOnly Property AssemblyDirectory   As String     Get         Dim codeBase As String   Assembly GetExecutingAssembly   CodeBase         Dim uriBuilder As New UriBuilder codeBase          Dim assemblyPath As String   Uri UnescapeDataString uriBuilder Path          Return Path GetDirectoryName assemblyPath      End Get End Property

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How about this        string ThisdllDirectory   System IO Path GetDirectoryName System Reflection Assembly GetExecutingAssembly   Location     Then just hack off what you do not need

[c#] How do I get the path of the assembly the code is in?

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