Code to rename namespaces from compiled assemblies using Mono.Cecil

gistfile1.cs

using Mono.Cecil;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace CecilTest
{
    class Program
    {
        static string path = @"C:\Source\Ledgerscope\Intuit\ipp-v3-dotnet-devkit-3.0.2";
        static string newPath = @"C:\Source\Ledgerscope\Intuit\IL rewriting\V3";
        static string ipp = "Intuit.Ipp.";
        static string version = "Intuit.Ipp.V3.";

        static void Main(string[] args)
        {
            var files = Directory.GetFiles(path, "*.dll");
            foreach (var item in files)
            {
                AssemblyDefinition ad = AssemblyDefinition.ReadAssembly(item);
                fixNamespace(ad, new Dictionary<string,TypeDefinition>());
            }
        }

        static void fixNamespace(AssemblyDefinition ad, Dictionary<string, TypeDefinition> references)
        {
            ad.Name.Name = ad.Name.Name.Replace(ipp, version);

            foreach (var item in ad.MainModule.AssemblyReferences)
            {
                var fileName = Path.Combine(path, item.Name + ".dll");
                item.Name = item.Name.Replace(ipp, version);
                if (File.Exists(fileName))
                {
                    AssemblyDefinition a2 = AssemblyDefinition.ReadAssembly(fileName);
                    fixNamespace(a2, references);
                }
            }

            foreach (var item in ad.MainModule.Types)
            {
                if (item.Namespace.StartsWith(ipp) && !item.Namespace.StartsWith(version))
                {
                    if (!references.ContainsKey(item.Name))
                        references.Add(item.Name, item);
                    item.Namespace = item.Namespace.Replace(ipp, version);
                }
            }

            //Required to update the constructor arguments
            foreach (var item in ad.MainModule.Types)
            {
                foreach (var attr in item.CustomAttributes)
                {
                    if (attr.HasConstructorArguments)
                    {
                        if (attr.ConstructorArguments.Any(a => a.Type.Name == "Type"))
                        {

                        }

                    }
                }
            }

            ad.Write(Path.Combine(newPath, ad.Name.Name + ".dll"));
        }
    }
}