System.Object
   C1.Data.Express.C1ExpressJoin
   C1.Data.Express.C1ExpressRelation
   C1.Data.SchemaObjects.Field
      C1.Data.Express.C1ExpressField
   System.Collections.CollectionBase
      C1.Data.Express.C1ExpressFieldCollection
      C1.Data.Express.C1ExpressJoinCollection
      C1.Data.Express.C1ExpressRelationCollection
   System.EventArgs
      C1.Data.GenerateSqlEventArgs
         C1.Data.Express.ExpressGenerateSqlEventArgs
   System.MarshalByRefObject
      System.ComponentModel.Component
         C1.Data.BaseComponent
            C1.Data.BaseFormAwareComponent
               C1.Data.BaseDataSourceComponent
                  C1.Data.BaseDataTableSource
                     C1.Data.Express.C1ExpressTable
                  C1.Data.C1DataView
                     C1.Data.Express.C1ExpressView
               C1.Data.Express.C1ExpressConnection

Reference

C1.Data.Express.2 Assembly