Updated: July 2008
The by contextual keyword is used in the group clause in a query expression to specify pecify how the returned items will be grouped.. For more information, see group clause (C# Reference) [ http://msdn.microsoft.com/en-us/library/bb384063.aspx ] .
The following example shows the use of the by contextual keyword in a group clause to specify that the students should be grouped according to the first letter of the last name of each student.
var query = from student in students group student by student.LastName[0];
Date
History
Reason
July 2008
Added topic.
Information enhancement.