C# 字符串操作详解

var str = "Hello World";
//将字符串转换成字符数组
var result = str.ToCharArray();
var enumerator = result.GetEnumerator();
while (enumerator.MoveNext())
{
     Console.WriteLine(enumerator.Current);
}

            var str = "Hello World";
            //将字符串转换成字符数组
            var result = str.ToCharArray(2,2);
            var enumerator = result.GetEnumerator();
            while (enumerator.MoveNext())
            {
                Console.WriteLine(enumerator.Current);
            }

            var str = "          Hello World              "; 
            //调用trim方法去除前后的空格
            var result = str.Trim();
            Console.WriteLine("str的原长度:{0},str调用Trim()方法之后的长度{1},结果字符串:{2}",str.Length,result.Length, "$"+ result + "$");