c# - lambda 相当于 collection.Count(predicate)

Question

什么是以下代码的等价 lambda 表达式

int[] numbers = { 3, 4, 5, 6, 7, 8 };
int count = numbers.Count(x => x > 5 == true); 

我试过这个，但它没有编译:

var c = from number in numbers where number > 5 select numbers.Count;

这个也没有编译:

var c = from number in numbers where number > 5 select new {numbers.Count};

Answer 1

你很接近，只需要像这样将 LINQ 表达式括在括号中:

var c = (from number in numbers where number > 5 select number).Count();