PEVerify giving coded rid out of range after adding interface

Hi,

I’ve just started using cecil so I’m sure I must be missing something. I’m attempting to static weave the INotifyPropertyChanged interface onto objects that are decorated with a custom attribute.

I can weave the IL into the properties just fine, but as soon as I try to add the interface I get the following error for PEVerify:

[MD]: Error (Structural): Table=0x00000009, Col=0x00000001, Row=0x00000003, has coded rid out of range.
1 Error(s) Verifying .\StaticWeaving.exe

I am using the following code to implement the interface on an AfterBuild task:

using (var notifyPropertyChangedAssembly = AssemblyDefinition.ReadAssembly(typeof(INotifyPropertyChanged).Assembly.Location))
                {
                    using (var assembly = AssemblyDefinition.ReadAssembly(AssemblyPath, new ReaderParameters { ReadWrite = true }))
                    {
                        foreach (var type in assembly.MainModule.Types)
                        {
                            if (type.CustomAttributes.Any(x => x.Constructor.DeclaringType.FullName == typeof(NotifyPropertyChangedAttribute).FullName))
                            {
                                if (!type.Interfaces.Any(x => x.InterfaceType.FullName == typeof(INotifyPropertyChanged).FullName))
                                {
                                    Log.LogMessage($"{type.FullName} has {nameof(NotifyPropertyChangedAttribute)} but no {nameof(INotifyPropertyChanged)} implementation. Weaving...");

                                    var notifyPropertyChangedType = notifyPropertyChangedAssembly.MainModule.Types.FirstOrDefault(x => x.FullName == typeof(INotifyPropertyChanged).FullName);

                                    Log.LogMessage(notifyPropertyChangedType.FullName);

                                    type.Interfaces.Add(new InterfaceImplementation(notifyPropertyChangedType));
                                }
                            }
                        }

                        assembly.Write();
                    }
                }

[SimonCropp]

“dismayed” ?

[SimonCropp]

BTW have u seen this https://github.com/Fody/PropertyChanged/ ?