The type of the IEnumerable<T> to be returned.
The algorithm for matching columns in the result of the query to fields or properties in the object works as follows:
If a field or property is mapped to a particular column name, that column name is expected in the resultset.
If a field or property is not mapped, a column with the same name as the field or property is expected in the resultset.
The comparison is performed by looking for a case-sensitive match first. If this match is not found, a subsequent search occurs for a case-insensitive match.
The query must return all the tracked fields and properties of the object (except those that are loaded on a deferred basis) when all the following conditions are true:
T is an entity explicitly tracked by the DataContext.
ObjectTrackingEnabled is true.
The entity has a primary key.
Otherwise an exception is thrown.