I am really stuck on this one and could use some help.
This problem started when I added an async method involving httpclient to a class library. I call the class library from a short test console application. When it gets to the async method I get an exception:
System.IO.FileNotFoundException: 'Could not load file or assembly 'System.Net.Http, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.'
Originally it said Could not load System.Net.Http Version 4.1.1.2 (I had version 4.0.0.0 in the project) and I was using Framework 4.5.2. I could not find a system.net.http version 4.1.1.2 for NET Framework 4.5.2 so I first updated the class library and test projects to NFW 4.7.2 and then added a reference to the version of System.Net.Http associated with this framework (i.e. choosing it from the assemblies tab).
When I look at the properties of the dll in the class lib project (toolslib) it shows 4.2.0.0. I added the same reference to the test project used to call it and it also now shows 4.2.0.0.
Additionally I added a redirect section to the app.config for toolslib
<dependentAssembly>
<assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral"/>
<bindingRedirect oldVersion="0.0.0.0-4.2.0.0" newVersion="4.2.0.0"/>
</dependentAssembly>
I put the same lines in the app.config for the test console app.
However I still get the same issue now with it saying it can't load 4.2.0.0. I set up Fusion Logs and got the following after running and getting the exception:
*** Assembly Binder Log Entry (7/9/2020 @ 9:12:52 PM) ***
The operation failed.
Bind result: hr = 0x80070002. The system cannot find the file specified.
Assembly manager loaded from: C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable C:\Users\smjhu\Documents\DevProjects\IDXUtil\Test\bin\Debug\Test.exe
--- A detailed error log follows.
=== Pre-bind state information ===
LOG: DisplayName = System.Net.Http, Version=4.2.0.0, Culture=neutral, ]PublicKeyToken=b03f5f7f11d50a3a
(Fully-specified)
LOG: Appbase = file:///C:/Users/smjhu/Documents/DevProjects/IDXUtil/Test/bin/Debug/
LOG: Initial PrivatePath = NULL
LOG: Dynamic Base = NULL
LOG: Cache Base = NULL
LOG: AppName = Test.exe
Calling assembly : ToolsLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null.
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\Users\smjhu\Documents\DevProjects\IDXUtil\Test\bin\Debug\Test.exe.Config
LOG: Using host configuration file:
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Redirect found in application configuration file: 4.2.0.0 redirected to 4.2.0.0.
LOG: Post-policy reference: System.Net.Http, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
LOG: GAC Lookup was unsuccessful.
LOG: Attempting download of new URL file:///C:/Users/smjhu/Documents/DevProjects/IDXUtil/Test/bin/Debug/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/Users/smjhu/Documents/DevProjects/IDXUtil/Test/bin/Debug/System.Net.Http/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/Users/smjhu/Documents/DevProjects/IDXUtil/Test/bin/Debug/System.Net.Http.EXE.
LOG: Attempting download of new URL file:///C:/Users/smjhu/Documents/DevProjects/IDXUtil/Test/bin/Debug/System.Net.Http/System.Net.Http.EXE.
LOG: All probing URLs attempted and failed.
The only thing I can see from the logs is it appears to be attempting to look for the dll in the test/bin/debug folder.
I tried setting the dll to copy local but same result.
I then tried copying the system.net.http dll into the bin/debug folder manually but then when I hit that method I get a badimage exception saying I cannot use reference assemblies.
BTW also tried updating system.net.http with nuget with same result
