Coding improvements

My class contains 5 functions for database Interaction. All database functions contains SQL Command class. In the same way there exists many classes that has almost 98% same functions and same coding standard. Here the problem is when I create the new class for new database table ...I write everything from scratch to do all Possible things to make the database interaction successful. I want to show you the code and need suggestions and implementations to reduce the code and increase the re usability. I am using ASP.NET MVC Razor C# . Can you come on Team Viewer ?