Linq 生成运算符 Empty,Range,Repeat

            var c1 = Enumerable.Empty<string>();//c1.Count=0
            var rlist = Enumerable.Range(9527, 10);//{9527,9528,9529,......9536}
            var rrlist = Enumerable.Repeat(9527, 10);//{9527,9527,9527...9527}