Lambda 表达式应用

我们不会在查询语法中直接用到 Lambda 表达式，但会在方法调用中用到这些表达式，并且查询表达式可以包含方法调用。

class SimpleLambda
{
    static void Main()
    {
        // Data source. 
        int[] scores = { 90, 71, 82, 93, 75, 82 };

        // The call to Count forces iteration of the source 
        int highScoreCount = scores.Where(n => n > 80).Count();

        // Outputs: 4 scores are greater than 80  
        Console.WriteLine("{0} scores are greater than 80", highScoreCount);
    }
}