Dashing.Console.Program.InjectConnectionString C# (CSharp) Method

        private static void InjectConnectionString(DashingSettings dashingSettings, ConnectionStringSettings connectionStringSettings) {
            var assemblyDefinition = AssemblyDefinition.ReadAssembly(dashingSettings.PathToDll);
            var cecilConfigType = assemblyDefinition.MainModule.Types.Single(t => t.FullName == dashingSettings.ConfigurationName);
            var constructor = cecilConfigType.Methods.FirstOrDefault(m => m.IsConstructor && !m.HasParameters); // default constructor
            if (constructor == null) {
                using (Color(ConsoleColor.Red)) {
                    throw new CatchyException("Unable to find a Default Constructor on the Configuration");
                }
            }

            var getConnectionStringCall =
                constructor.Body.Instructions.FirstOrDefault(
                    i =>
                    i.OpCode.Code == Code.Call
                    && i.Operand.ToString()
                    == "System.Configuration.ConnectionStringSettingsCollection System.Configuration.ConfigurationManager::get_ConnectionStrings()");
            if (getConnectionStringCall == null) {
                using (Color(ConsoleColor.Red)) {
                    throw new CatchyException("Unable to find the ConnectionStrings call in the constructor");
                }
            }

            var connectionStringKey = getConnectionStringCall.Next.Operand.ToString();

            // override readonly property of connectionstrings
            var readOnlyField = typeof(ConfigurationElementCollection).GetField("bReadOnly", BindingFlags.Instance | BindingFlags.NonPublic);
            if (readOnlyField != null) {
                readOnlyField.SetValue(ConfigurationManager.ConnectionStrings, false);
            }

            // remove any existing
            if (ConfigurationManager.ConnectionStrings[connectionStringKey] != null) {
                ConfigurationManager.ConnectionStrings.Remove(connectionStringKey);
            }

            // and add in the one from our ini
            ConfigurationManager.ConnectionStrings.Add(
                new System.Configuration.ConnectionStringSettings(
                    connectionStringKey,
                    connectionStringSettings.ConnectionString,
                    connectionStringSettings.ProviderName));
        }