LINQ, C#'s Language Integrated Query, simplifies the code needed to query, reshape, and aggregate data. Instead of writing complex, nested loops to implement procedures for working with data, LINQ enables a more functional, declarative style. LINQ queries more closely resemble SQL than a procedural language like C. In this course, you'll learn about iterator methods, including their advantages, how to step through and implement them, and how to convert a standard method to an iterator method. You'll also examine filtering and ordering data using LINQ to Objects, using LINQ's let clause, and the purpose of deferred execution. Finally, you'll learn about aggregating, grouping, and joining data using LINQ to Objects. This course was originally created by Global Knowledge (GK).

LINQ to XML is a library for querying and creating XML. In this course, you'll explore LINQ to XML, including how to read and query an XML file, load an XML file and find elements, write queries, manipulate and add to an XML document, and extract numerical values. You'll also examine the use of select statements with LINQ to XML, querying documents that include XML namespaces, and creating XML documents. Finally, you'll learn how to create XML using XElement, assemble XML documents with the XElement.Add method, the differences between the system.Xml.Linq and the system.Xml namespaces, and how to write XML with namespaces. This course was originally created by Global Knowledge (GK).