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LINQ to SQL offers maximum flexibility in manipulating and persisting changes that you made to your objects.

As soon as entity objects are available (either by retrieving them through a query or by constructing them anew), you can change them as typical objects in your application. Contact Name = "New Contact"; // Create and add a new Order to the Orders collection.

The following example shows how to create a new application that retrieves and updates information in a SQL Server database.

The examples in this topic use the Northwind sample database.

I want to take the value of one property from an object on the new list and set the property on the old list on the matching object the the new value.

With a classic loop you can easily iterate your collection and update its items.operations in LINQ to SQL by adding, changing, and removing objects in your object model. Orders[0]; // Removing it from the table also removes it from the Customer’s list. By default, LINQ to SQL translates your actions to SQL and submits the changes to the database. If you do not have this database on your development computer, you can download it from the Microsoft Download Center.For instructions, see Downloading Sample Databases.

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The following example shows how to combine two in-memory data structures, but the same principles can be applied to combine data from XML or SQL or Data Set sources.

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