Professional LINQ

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Scott Klein

"Professional LINQ"

FirstName.StartsWith("S")
select c.FirstName;
listBox1.Items.Add(query.First());
This method throws an exception if the source sequence contains no elements. Use the FirstOrDefault
operator if there is a possibility that the source might be empty.
You can also add specific criteria when using this operator. The following code returns the first element
that satisfies a specific condition, the first name whose length is greater than 5.
listBox1.Items.Add(query.First(name => name.Length > 5));
79
Part I: Introduction to Project LINQ
Last
The opposite of the First operator, the Last operator returns the last element in a collection. Here the
Contact table is queried looking for all contacts whose first name begins with the letter S, and the Last
operator returns the last element from the returned collection:
DataContext context = new DataContext("Initial Catalog = @@ta
AdventureWorks;Integrated Security=sspi");
Table contact = context.GetTable();
var query = from c in contact
where c.FirstName.StartsWith("S")
select c.

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Scott Klein

"Professional LINQ"