Professional LINQ

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Scott Klein

"Professional LINQ"

FirstName;
listBox1.Items.Add(query.Last());
You can also add specific criteria when using this operator. For instance, the following returns the last
element that satisfies a specific condition, the first name whose length is less than 5:
listBox1.Items.Add(query.Last(name => name.Length < 5));
FirstOrDefault
The FirstOrDefault operator returns the first element from a collection or, if no element is found, a
default value. The following example queries the Contact table looking for all contacts whose first name
begins with the letters ZZ, and the FirstOrDefault operator returns the first element from the returned
collection. If the element is not found, a default value is returned. The default value is defined as the first
element that is found that meets the query condition(s).
DataContext context = new DataContext("Initial Catalog=AdventureWorks;Integrated
Security=sspi");
Table contact = context.GetTable();
var query = from c in contact
where c.FirstName.StartsWith("ZZ")
select c.FirstName;
listBox1.Items.

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Scott Klein

"Professional LINQ"