I am Gaurav Khanna - a Microsoft MVP and Lead Developer & Founder of Volcor Software, a Microsoft Partner Software Development Company.
We have gone through your requirement for "Quote & Invoice System for contractor and service provider". I will propose creating a desktop based application in WPF technology. We have created many billing system as per the requirement of our clients. So we can easily develop the invoice system.
Let me know if you would like to see sample of one of our billing system created in WPF.
We have proficiency in Desktop, Website and Mobile application Development and have worked on many complex projects as your can see in our portfolio.
Our Technology Experience
Software Technologies: C#, VB.NET, WPF, WCF, Crystal Reports, Windows Services, Windows Form,
Web Development Technologies: ASP.NET Web Form, ASP.NET Razor/MVC, Bootstrap, JQuery, HTML5, Web Service
Mobile app Development: Windows Phone apps, Windows 8 apps
Database: SQL Server, PostgreSQL, MySQL, SQLite
Our Achievements
* Microsoft Partner Software Development Company
* I/We have 13+ years of development experience
* I have been 9 times awarded Microsoft MVP (Most Valuable Professional) by Microsoft
You can also see our portfolio to know about my/our expertise in Software Development. Please provide more details about your requirement.
Thanks,
Gaurav Khanna
Volcor Software