Hello,

A DBML generated with VisualStudio may have Columns without Member attribute, 
in this case DMetal crashes. When Member is not specified this is the Name 
attribute that must be used.

Moreover, when using a custom class to match SQL type, the attribute Type is 
not recognized by DBMetal. In CodeDomGenerator.GenerateTableClass() the 
fieldType is null.
When creating the CodeBinaryOperatorExpression condition we can test if 
fieldType is null and if column type's name stars with "global".

Regards.

Ghislain