How to make generic method using reflection on classes within the same project

Refer to the code below.

dbConn.Open();
                    List<MigrateAnnex> list13 = dbConn.ReadAll<MigrateAnnex>(parameter.SQLQuery);
                    dbConn.Close();
                    //convert to csv
                    using (var writer = new StreamWriter(parameter.FullPath))
                    using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
                    {
                        csv.Context.RegisterClassMap<MigrateAnnexMap>();
                        csv.WriteRecords(list13);
                    }
                    break;

I have this snippet of code and what I want to achieve is I need to make a method that will call this line of code and make the type as the parameter. I'm aware of generics and reflection but I don't want to have a line of code that will call the generic method and pass the parameter but instead, I just want to load all the possible classes that I have in my project then using reflection I can inject the type to call the generic method.

I have these classes within the main project and these classes are the parameters that I need to pass on the generic method. The question is how can I do that, I already used Assembly.LoadFrom where I can load directly the dll but I don't want to make another class library. I just want to stay my classes on the same project for simplicity sake. I don't know if there are other option to use Assembly.LoadFrom or a much better approach to solve my issue.