One or more selected items contain a data type that is not supported by the designer

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One or more of the items dragged from Server Explorer/Database Explorer onto the O/R Designer contains a data type that is not supported by the O/R Designer (for example, CLR User-Defined Types).

To correct this error

  1. Create a view that is based on the desired table and that does not include the unsupported data type.

  2. Drag the view from Server Explorer/Database Explorer onto the designer.

See Also

LINQ to SQL Tools in Visual Studio Walkthrough: Creating LINQ to SQL Classes (O-R Designer) LINQ to SQL