What is WCF? | WCF Interview Question

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Windows Communication Foundation (WCF) is a framework for building service-oriented applications. WCF helps to send messages asynchronously from one service endpoint to another

Windows Communication Foundation (WCF) is an SDK for developing and deploying services on Windows. WCF provides a runtime environment for services, enabling you to expose CLR types as services, and to consume other services as CLR types.

WCF is part of .NET 3.0 and requires .NET 2.0, so it can only run on systems that support it.