LINQ to SQL : Missing Manual are at MSDN
Describes the relationship of ADO.NET and LINQ to SQL.
Analyzing LINQ to SQL Source Code
Describes how to analyze LINQ to SQL mapping by generating and viewing source code from the Northwind sample database.
Customizing Insert, Update, and Delete Operations (LINQ to SQL)
Describes how to add validation code and other customizations.
Describes how LINQ to SQL uses IListSource to support data binding.
Inheritance Support (LINQ to SQL)
Describes the role of inheritance in the LINQ to SQL object model, and how to use related operators in your queries.
Local Method Calls (LINQ to SQL)
Describes LINQ to SQL support for local method calls.
Data Retrieval and CUD Operations in N-Tier Applications (LINQ to SQL)
Provides detailed information for multi-tier applications that use LINQ to SQL.
Describes object identity in the LINQ to SQL object model, and explains how this feature differs from object identity in a database.
Describes the object model and its relationship to the relational data model.
Object States and Change-Tracking (LINQ to SQL)
Provides detailed information about how LINQ to SQL tracks changes.
Optimistic Concurrency Overview (LINQ to SQL)
Describes optimistic concurrency and defines terms.
Describes aspects of queries in LINQ to SQL that differ from queries in LINQ.
Describes the correct approach to security in database connections.
Describes the serialization process in LINQ to SQL applications.
Stored Procedures (LINQ to SQL)
Describes how to map stored procedures at design time and how to call them from your application.
Outlines the three models of transaction that LINQ to SQL supports.
Type System Mismatches (LINQ to SQL)
Describes the challenges of mingling different type systems.
User-Defined Functions (LINQ to SQL)
Describes how to map user-defined functions at design time and how to call them from your application.
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