Clean up the diagnostic in FieldToProperty pass.

src/Generator/Passes/FieldToPropertyPass.cs

@@ -51,8 +51,7 @@ namespace CppSharp.Passes
 
             @class.Properties.Add(prop);
 
-            Diagnostics.Debug("Property created from field: {0}::{1}", @class.Name,
-                field.Name);
+            Diagnostics.Debug($"Property created from field: {field.QualifiedName}");
 
             return false;
         }