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C # 3.5 winforms application updated to C # 4.0 due to CAS exception

I have a C # 4.0 Winform application that I just upgraded from 3.5 to 4.0. The C # 4.0 Winforms application refers to a C # 3.5 DLL, which will load a series of DLLs from network paths based on user selections and then create / invoke DLLs using System.Reflection. Everything worked perfectly when the application was configured to use 3.5 as the target structure. I got this error after updating:

An attempt was made to download the assembly from a network location, which would make the assembly isolated in previous versions of the .NET Framework. This release of the .NET Framework does not include a default CAS policy, so this download can be dangerous. If this load is not intended for the build sandbox, enable the loadFromRemoteSources switch. See http://go.microsoft.com/fwlink/?LinkId=155569 for more details .

This happens when I try to load the assembly from the network path:

var assembly = Assembly.LoadFile(path);

After doing some research, I found that CAS was "partly" fixed in version 4.0. I was asked to put the following entries in my app.config:

<runtime>
    <loadFromRemoteSources enabled="true"/>
    <NetFx40_LegacySecurityPolicy enabled="true"/>
</runtime>

Now I get an exception:

. System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean & canBeCached, RuntimeMethodHandleInternal & ctor, Boolean & bNeedSecurityCheck)   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache)   System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache)   System.Activator.CreateInstance( , Boolean nonPublic)   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object [] args, CultureInfo , Object [] activationAttributes)   System.Activator.CreateInstance( , BindingFlags bindingAttr, , Object [] args, CultureInfo , Object [] activationAttributes)   System.Reflection.Assembly.CreateInstance(String typeName, Boolean ignoreCase, BindingFlags bindingAttr, , Object [] args, CultureInfo , Object [] activationAttributes)   System.Reflection.Assembly.CreateInstance(String typeName)   Architecture.Data.Transformations.AssemblyHelperBase.CreateInstanceExplicit [T] ( , String typeName)   Architecture.Data.Transformations.MappingTransform.ProcessMap(String map, String path, IXPathNavigable doc)   Architecture.Data.Transformations.MappingTransform.Execute(String map, String path, XmlDocument transformXml)   Architecture.Data.Transformations.MappingTransform.Execute(XmlDocument transformXml, Int32 historyID)   Architecture.Data.Transformations.TransformationsDataService.TransformXmlMap(XmlDocument transformXml, Int32 historyID)   Architecture.Data.Transformations.TransformationsDataService.CreatePCSXml(HistoryRecord historyRecord)   Architecture.Data.Transformations.TransformationsDataService.ReShred(Int32 historyID)

: .

, , Activator .

protected T CreateInstanceExplicit<T>(Assembly assembly, String typeName)
{
    return (T)assembly.CreateInstance(typeName);
}

Windows # 4.0 Winforms ( .snk). " ". app.config , . , , , winforms 4.0 3.5. - ?

+3
1

<loadFromRemoteSources> . MSDN :

, (CAS) .

CAS. Caspol.exe, . .

+2

Source: https://habr.com/ru/post/1764971/

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