Represents the main entry point for the LINQ to SQL framework.
Assembly: System.Data.Linq (in System.Data.Linq.dll)
The is the source of all entities mapped over a database connection. It tracks changes that you made to all retrieved entities and maintains an "identity cache" that guarantees that entities retrieved more than one time are represented by using the same object instance.
In general, a instance is designed to last for one "unit of work" however your application defines that term. A is lightweight and is not expensive to create. A typical LINQ to SQL application creates instances at method scope or as a member of short-lived classes that represent a logical set of related database operations.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.