C# DbConnection

An instance field, in C#, is a variable of any type contained within a class or struct, and is used to store object data . It is a member of its containing type with one copy of the field for each instance of the containing type. Instance fields represent the data of a class that enables an object to maintain its state.

Summary

Similarly, classes define objects by telling other code what the object contains and what it can do . Classes are essential in object-oriented programming (as well as ASP.NET). You define a class to wrap up some common code and properties, just like combining clock parts to build a clock.

A SqlConnection object represents a unique session to a SQL Server data source . With a client/server database system, it is equivalent to a network connection to the server. SqlConnection is used together with SqlDataAdapter and SqlCommand to increase performance when connecting to a Microsoft SQL Server database.