Hi,

I create Dataset with field of "System.Guid" type in VS2005. Then I put down the "DefaultValue" for the field equals to "00000000-0000-0000-0000-000000000000".

When I click to build the project with this Dataset, so AFAIK VisualStudio makes my Dataset but fails and gives me the following error message:

"Error 1 Custom tool error: Failed to generate code. Failed to generate code. Object of type 'System.Guid' cannot be converted to type 'System.String'. Object of type 'System.Guid' cannot be converted to type 'System.String'..."

Notice if I put down the "DefaultValue" equaled to <DBNull> then everything goes fine and the project is bult OK. SO something wrong with my default value. Probably I used the wrong format.

What the format would be TIA.