如何从 class 获取它继承的所有接口（使用 roslyn）？

Question

I have a class Letters that inherits from interface IA , and IA inherits from interface IB . How can I get with roslyn the interfaces IA and IB ? (I have ClassDeclarationSyntax )

public interface IB
{
}
public interface IA : IB
{
}
public class Letters:IA
{
}

Answer 1

Try something like,

 var interFacesOfLetters = typeof(Letters).GetInterfaces();
            foreach (var x in interFacesOfLetters)
            {
                Console.WriteLine(x.Name);
            }

Edit #1

for dynamic class name,

  var name = "NameSpaceName.Letters";
  var interFacesOfLetters = Type.GetType(name).GetInterfaces();
  foreach (var x in interFacesOfLetters)
  {
    Console.WriteLine(x.Name);
  }

Answer 2

The other answers are valid only if you're trying to use reflection to access type information.

To use Roslyn you'll have to use the SemanticModel to get an INamedTypeSymbol for your Letters class and then use .AllInterfaces

I don't have Roslyn installed but it should be something like:

var tree = CSharpSyntaxTree.ParseText(@"
public interface IB
{
}
public interface IA : IB
{
}
public class Letters:IA
{
}
");

var Mscorlib = PortableExecutableReference.CreateFromAssembly(typeof(object).Assembly);
var compilation = CSharpCompilation.Create("MyCompilation",
    syntaxTrees: new[] { tree }, references: new[] { Mscorlib });
var model = compilation.GetSemanticModel(tree);

var myClass = tree.GetRoot().DescendantNodes().OfType<ClassDeclarationSyntax>().Last();
var myClassSymbol = model.GetDeclaredSymbol(myClass);

var interfaces = myClassSymbol.AllInterfaces;