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Eliminate Duplicate Elements from a Sequence

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Use the Distinct operator to eliminate duplicate elements from a sequence.

Example

The following example uses Distinct to select a sequence of the unique cities that have customers.

IQueryable<String> cityQuery =
    (from cust in db.Customers
    select cust.City).Distinct();

foreach (String cityString in cityQuery)
{
    Console.WriteLine(cityString);
}

Dim cityQuery = _
    (From cust In db.Customers _
     Select cust.City).Distinct()

For Each cityString In cityQuery
    Console.WriteLine(cityString)
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