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copied!<p>I had issues with <a href="https://stackoverflow.com/a/317209/1574221">stefan's solution</a>. Below is a modified version which seems to work well.</p> <pre><code>using System; using System.Collections; using System.Diagnostics; using System.Management; using System.IO; static class Module1 { static internal ArrayList myProcessArray = new ArrayList(); private static Process myProcess; public static void Main() { string strFile = "c:\\windows\\system32\\msi.dll"; ArrayList a = getFileProcesses(strFile); foreach (Process p in a) { Debug.Print(p.ProcessName); } } private static ArrayList getFileProcesses(string strFile) { myProcessArray.Clear(); Process[] processes = Process.GetProcesses(); int i = 0; for (i = 0; i <= processes.GetUpperBound(0) - 1; i++) { myProcess = processes[i]; //if (!myProcess.HasExited) //This will cause an "Access is denied" error if (myProcess.Threads.Count > 0) { try { ProcessModuleCollection modules = myProcess.Modules; int j = 0; for (j = 0; j <= modules.Count - 1; j++) { if ((modules[j].FileName.ToLower().CompareTo(strFile.ToLower()) == 0)) { myProcessArray.Add(myProcess); break; // TODO: might not be correct. Was : Exit For } } } catch (Exception exception) { //MsgBox(("Error : " & exception.Message)) } } } return myProcessArray; } } </code></pre> <p><strong>UPDATE</strong></p> <p>If you just want to know which process(es) are locking a particular DLL, you can execute and parse the output of <code>tasklist /m YourDllName.dll</code>. Works on Windows XP and later. See</p> <p><a href="https://stackoverflow.com/questions/152506/what-does-this-do-tasklist-m-mscor">What does this do? tasklist /m "mscor*"</a></p>

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