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  1. PO
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    <p>Here is a solution. It uses p/invoke, but seems to work well, 32 or 64 cpu:</p> <pre><code> /// &lt;summary&gt; /// A utility class to determine a process parent. /// &lt;/summary&gt; [StructLayout(LayoutKind.Sequential)] public struct ParentProcessUtilities { // These members must match PROCESS_BASIC_INFORMATION internal IntPtr Reserved1; internal IntPtr PebBaseAddress; internal IntPtr Reserved2_0; internal IntPtr Reserved2_1; internal IntPtr UniqueProcessId; internal IntPtr InheritedFromUniqueProcessId; [DllImport("ntdll.dll")] private static extern int NtQueryInformationProcess(IntPtr processHandle, int processInformationClass, ref ParentProcessUtilities processInformation, int processInformationLength, out int returnLength); /// &lt;summary&gt; /// Gets the parent process of the current process. /// &lt;/summary&gt; /// &lt;returns&gt;An instance of the Process class.&lt;/returns&gt; public static Process GetParentProcess() { return GetParentProcess(Process.GetCurrentProcess().Handle); } /// &lt;summary&gt; /// Gets the parent process of specified process. /// &lt;/summary&gt; /// &lt;param name="id"&gt;The process id.&lt;/param&gt; /// &lt;returns&gt;An instance of the Process class.&lt;/returns&gt; public static Process GetParentProcess(int id) { Process process = Process.GetProcessById(id); return GetParentProcess(process.Handle); } /// &lt;summary&gt; /// Gets the parent process of a specified process. /// &lt;/summary&gt; /// &lt;param name="handle"&gt;The process handle.&lt;/param&gt; /// &lt;returns&gt;An instance of the Process class.&lt;/returns&gt; public static Process GetParentProcess(IntPtr handle) { ParentProcessUtilities pbi = new ParentProcessUtilities(); int returnLength; int status = NtQueryInformationProcess(handle, 0, ref pbi, Marshal.SizeOf(pbi), out returnLength); if (status != 0) throw new Win32Exception(status); try { return Process.GetProcessById(pbi.InheritedFromUniqueProcessId.ToInt32()); } catch (ArgumentException) { // not found return null; } } } </code></pre>
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    1. POHow to get parent process in .NET in managed way
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    1. USSimon Mourier
    1. USSimon Mourier
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      1. VTUpMod
    2. VO
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    1. CONice but not managed :)
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      1. USabatishchev
    2. COIt's actually managed, but not portable on another OS than Windows you're right. However, the notion of a parent process is not portable either, since it's not in the .NET Framework itself, so I don't think it's a big issue.
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      1. USSimon Mourier
    3. COGreat! No slow perf counters. I really hate the "not managed" comments. How is querying a perf counter more managed then using P/Invoke.
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      1. USJabe
 

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