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Editorial Team
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Asked: 2026-06-14T23:14:59+00:00

I am trying to load a strongly named assembly that is located at a

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I am trying to load a strongly named assembly that is located at a user-defined location into an AppDomain using this code:

    AppDomainSetup ads1 = new AppDomainSetup();
    if (ads1.PrivateBinPath != null)
    {
        ads1.PrivateBinPath += ads1.PrivateBinPath.Length == 0 ? "" : Path.PathSeparator.ToString();
    }
    ads1.PrivateBinPath += @"c:\work\abc1";
    sandbox1 = AppDomain.CreateDomain("sandbox1", null, ads1);
    Object o1 = sandbox1.CreateInstanceFromAndUnwrap(@"abc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=f10808f3df0adc34", "Abc.Def");

When I run I get this error:

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'file:///C:\Users\gel\Documents\Visual Studio 2012\Projects\ConsoleApplicat
ion1\ConsoleApplication1\bin\Debug\abc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=f10808f3df0adc34' or one of its dependencies. The system cannot find the fil
e specified.
   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stack
Mark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& st
ackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& st
ackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm, Boole
an forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark)
   at System.Reflection.Assembly.LoadFrom(String assemblyFile, Evidence securityEvidence)
   at System.Activator.CreateInstanceFromInternal(String assemblyFile, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, C
ultureInfo culture, Object[] activationAttributes, Evidence securityInfo)
   at System.AppDomain.CreateInstanceFrom(String assemblyFile, String typeName)
   at System.AppDomain.CreateInstanceFromAndUnwrap(String assemblyName, String typeName)
   at System.AppDomain.CreateInstanceFromAndUnwrap(String assemblyName, String typeName)
   at ConsoleApplication1.Program.Main(String[] args) in c:\Users\gel\Documents\Visual Studio 2012\Projects\ConsoleApplication1\ConsoleApplication1\Program.cs:li
ne 69

It is as though the AppDomain is not looking in the PrivateBinPath at all. What am I not doing right? I’ve double checked in an Explorer window and I can see the assembly at the location that I specified in the PrivateBinPath. It works fine if I just do Assembly.LoadFile and specify the right path, but that’d defeating the purpose of trying to load it in another AppDomain.

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1 Answer

  1. Editorial Team

    I’ve modified your code and this works just great. See the changes you needs to be done. 

            AppDomainSetup ads1 = new AppDomainSetup();
        if (ads1.PrivateBinPath != null)
        {
            ads1.PrivateBinPath += ads1.PrivateBinPath.Length == 0 ? "" : Path.PathSeparator.ToString();
        }
        ads1.PrivateBinPath += @"D:\ConsoleApplication1\ClassLibrary1\bin\debug";
        AppDomain sandbox1 = AppDomain.CreateDomain("sandbox1", null, ads1);
        Object o1 = sandbox1.CreateInstanceFromAndUnwrap(@"ClassLibrary1.dll", "ClassLibrary1.Class1");
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