How to: Represent Computed Columns

Use the LINQ to SQL Expression property on a ColumnAttribute attribute to represent a column whose contents are the result of calculation.

For code examples, see Expression.

Note

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

To represent a computed column

1. Add the Expression property to the ColumnAttribute attribute.

2. Assign a string representation of the formula to the Expression property.

See also

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