The following example demonstrates how to create and use an abstract data accessor class. All abstract methods of the class are generated at run-time depending on each method declaration. Every part of the method declaration is important. Method's return value specifies one of the Execute methods in the following way:

Return Type	Execute Method
IDataReader interface	ExecuteReader
Subclass of DataSet	ExecuteDataSet
Subclass of DataTable	ExecuteDataTable
Class implementing the IList interface	ExecuteList or ExecuteScalarList
Class implementing the IDictionary interface	ExecuteDictionary or ExecuteScalarDictionary
void	ExecuteNonQuery
string, byte[] or value type	ExecuteScalar
In any other case	ExecuteObject

Method name explicitly defines action name which is converted to stored procedure name.
Type, sequential order, and name of the method parameters is mapped to the command parameters. Exceptions from this rule are: