Need C# code to send AT commands

Hi, I am experts in .Net, C#,Vb,Windows application,Asp.net Web Forms, MVC,WCF Service, Web Service, Web API,MSSQL Server 2014,2012,20082,2008,2005,2000,Crystal report ,Krypton Toolkit for Windows application Design, bootstrap Responsive design - HTML5, CSS3, jQuery, AJAX, Photoshop/Illustrator & other relevant open source scripting technologies. 100% responsive web design with bootstap css framework. I worked more than 50 projects in .Net in local market since 2013. I am new in freelancing. Judge me by hiring. My projects in .NET- o Point of Sale (POS) for -Retail shop, super shop, Pharmacy, Garments o Inventory Management for- Retail shop, super shop, Pharmacy, Garments o Hospital Management o Diagnostic Center Management o Pharmacy Management o Restaurant Management o SMS Sender o PKDAS (Professional Knowledge Development Software Assistant ) o TBMS (Telephone Bill Management System ) o Fleet Management System o Handicap Calculation System (Golf Club) o Student Result Processing and Student Management o File Management Software o Membership Database ,Share ,Plot ,Flat Transfer Software o Online Ticketing System o Point of sale o Sales o Online Toll Monitoring System o Fixed Asset Management o Token System o Export & Import Bill o HRM & Payroll Management o Garments ERP Solution o Library Management o Tea Auction I provide you my best professional work. I am waiting for your good response. Warm regards, Md. Mozammal Hossain