During the past few years,Windows Communication Foundation (WCF) has established itself as the fundamental technology to enable service orientation in the Microsoft platform. However,adopting WCF in the big enterprise requires complementing the sophisticated capabilities of WCF with efficient practices in areas such as configuration management,unit/load testing,dependency management,and versioning among many others. Enabling these capabilities facilitates the adoption of WCF in the enterprise in an agile and simple manner. This session presents a series of solutions and best practices for addressing important aspects such as configuration management,endpoint discovery,automated unit/load testing,service dependencies,etc. We illustrate these solutions using a series of practical demonstrations that will help developers to implement large WCF solutions in a more efficient and agile manner. Additionally,the session presents three case studies that highlight how customers are implementing some of these solutions to adopt WCF at a big scale in the enterprise.