[C language] LINQ overview

One ： LINQ What is it? ？

        LINQ You can easily query object collections .

        LINQ Important characteristics of ：

• LINQ Represents language integration query .
• LINQ yes   .NET Extensions to the framework , It allows us to use SQL Query the data set by querying the database .
• LINQ From the database , A collection of program objects and XML Query data in the document .

Two ：LINQ What is a provider ？

        LINQ It can work with various types of data sources , such as SQL database ,XML file , wait . However , For each data source type , There must be a basis behind it , This data source type implements LINQ Code module queried . These code modules are called ：LINQ Provider .

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