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Is it possible to use a LINQ Query in Windows Workflow rule condition?
private static void ShowQueryWithCode(IEnumerable<string> names)
{
    Console.WriteLine("LINQ Query in Code - show names that start with 'R'");

    // Assuming there are no null entries in the names collection
    var query = from name in names where name.StartsWith("R") select name;

    // This is the same thing as
    // var query = names.Where(name => name.StartsWith("R"));
    foreach (var name in query)
    {
        Console.WriteLine(name);
    }

    Console.WriteLine();
}