Write .Net code to FAST Upload products into Magento using SOAP API authentication

We want a code written in '.Net' only. Using this code, you will pick the item details from the attached Sample Database and PUSH into Magento. Using .Net code, we should be able to Add, Edit and Delete item and images in Magento store in real-time using SOAP API authentication. Likewise, using the same .Net code, you will pick the Web Order details from Magento, PULL them and store into the Tables of the attached Database. The code, that you will write, should hit the Magento SOAP API without using Admin panel's login details. I need the following scenarios to be covered for Uploading and Downloading: Uploading Fields ---------------------- Product SKU Product Name Simple and Configurable items (with attributes - Size, Color, Type, Weight, etc.) Price (all types - Sale Price, Regular Price, MSRP, List Price, etc.) Department/Categories Structure (Hierarchy: Clothing >> Mens >> Shirts >> Casuals) Type of product Availability Quantity Main Image of the Item Additional images of Item Main and Additional Images of Configurable items Order Tracking Number Customer details (First Name, Last Name, Address, Phone, Email, etc.) Downloading Fields -------------------------- Order Number Customer 'Bill To' name 'Bill To' Address Customer 'Ship To' Name 'Ship To' Address Email Address Phone Number Shipping Method Item Code Item Quantity Item Unit Price Total Price Discount Amount Tax Gross Total etc. ----- NOTE: * Speed of uploading items through SOAP API should be very fast. Minimum 150 items per minute. * You may have to create new fields/tables for the above data if anything found missing in attached sample database. * You don't need to create interface. Just write the code in .Net and my team will Test it.