Diagnostic CodeFix for CS0433: The type TypeName1 exists in both Assembly1 and Assembly2

[MaStr11]

Version Used:

VS 15.5.2

Steps to Reproduce:

If a projects references two libraries with the same type defined in the same namespace CS0433 is triggered if this type is used. A code fix should be offered that

1. adds an alias to the library reference,
2. adds an corresponding extern alias directive to the document
3. fully qualifies the type (additionally a type alias could be offered as in Ambiguous type codefix provider (using alias) #24022)

The fix should also be offered for warning CS0436 The type 'type' in 'assembly' conflicts with the imported type 'type2' in 'assembly'. Using the type defined in 'assembly'.

Before the fix:

Assembly1 File1.cs

namespace N1
{
    public class Ambiguous
    {
    }
}

Assembly2 File2.cs

namespace N1
{
    public class Ambiguous
    {
    }
}

TestAssembly
References Assembly1 and Assembly2
File3.cs in TestAssembly

namespace N2
{
    public class Test
    {
        void M()
        {
              new N1.Ambiguous(); //CS0433
        }
    }
}

After the fix:

TestAssembly
References Assembly1 reference is aliased with Assembly1Alias and Assembly2
File3.cs in TestAssembly

extern alias Assembly1Alias;
namespace N2
{
    public class Test
    {
        void M()
        {
              new Assembly1Alias::N1.Ambiguous(); 
        }
    }
}

Relates to #23326.

[CyrusNajmabadi]

Closing out for lack of customer feedback on this issue.