Nancy 2.0 Razor viewer has issues with .NET standard assemblies

[Lennartos]

Description

RazorAssemblyProvider.cs line 83 only checks the name and not assembly version.
As soon as some nuget references have more modern dependencies you get multiple assemblies like system.runtime which makes the .SingleOrDefault fail.

Steps to Reproduce

.NET 4.7 solution with rancy & razor viewengine - add nuget for sendgrid 9.9.
sendgrid has dependencies for System.Net.Http, which needs
System.Security.Cryptography.X509Certificates
which needs:
System.Security.Cryptography.Algorithms
which needs:
System.Runtime (>= 4.3.0)
which will cause the error as System.runtime 4.0 also is loaded.

• Nancy version: 2.0
• Nancy host ASP.NET
• .NET Framework version: 4.7

[jdixon-86]

+1

What about this to make sure you get the latest one? This would be assuming the version you are duplicating would be newer than the one on the OS:

//
// Old
//
private IEnumerable < Assembly > GetDefaultAssemblies() {
 var loadedAssemblies = new HashSet < Assembly > ();

 foreach(var assemblyDefinition in this.defaultAssemblyDefinitions) {
  var assembly = AppDomain.CurrentDomain.GetAssemblies() ** .SingleOrDefault ** x => x.GetName().Name.Equals(assemblyDefinition, StringComparison.OrdinalIgnoreCase));

 if (assembly != null) {
  loadedAssemblies.Add(assembly);
 }
}

return loadedAssemblies;
}

//
// New
//
private IEnumerable < Assembly > GetDefaultAssemblies() {
 var loadedAssemblies = new HashSet < Assembly > ();

 foreach(var assemblyDefinition in this.defaultAssemblyDefinitions) {
  var assembly = AppDomain.CurrentDomain.GetAssemblies().OrderByDescending(x => x.GetName().Version).FirstOrDefault(x => x.GetName().Name.Equals(assemblyDefinition, StringComparison.OrdinalIgnoreCase));

  if (assembly != null) {
   loadedAssemblies.Add(assembly);
  }
 }

 return loadedAssemblies;
}