Visual Basic® 2010 Unleashed

Aggregation Operators

Aggregation operators allow performing simple mathematic calculations on a sequence’s items using the Aggregate and Into clauses. The combination of such clauses can affect the following methods:

• Sum, which returns the sum of values of the specified property for each item in the collection

• Average, which returns the average calculation of values of the specified property for each item in the collection

• Count and LongCount, which return the number of items within a collection, respectively as Integer and Long types

• Min, which returns the lowest value for the specified sequence

• Max, which returns the highest value for the specified sequence

For example, you can get the sum of unit prices for your products as follows: ...