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How to: Represent Primary Keys (LINQ to SQL)

.NET Framework 4

.NET Framework 4.5
Visual Studio 2008
.NET Framework 3.5

Use the LINQ to SQL IsPrimaryKey property on the ColumnAttribute attribute to designate a property or field to represent the primary key for a database column.

For code examples, see IsPrimaryKey.

Note
LINQ to SQL does not support computed columns as primary keys.

To designate a property or field as a primary key

Add the IsPrimaryKey property to the ColumnAttribute attribute.
Specify the value as true.

Concepts

The LINQ to SQL Object Model

Other Resources

How to: Customize Entity Classes by Using the Code Editor (LINQ to SQL)

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