How to: Represent Primary Keys

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

1. Add the IsPrimaryKey property to the ColumnAttribute attribute.

2. Specify the value as true.

See also

• The LINQ to SQL Object Model
• How to: Customize Entity Classes by Using the Code Editor