//字符串拼接
//string naem = "张三";
//string desc = "学生";
//StringBuilder sb=new StringBuilder();
//sb.Append(naem);
//sb.Append(desc);
//Console.WriteLine(sb);//string.Format() 格式化字符串
//string name = "张三";
//string desc = "是个好人";
//string keyWord = "人品";
//string res = string.Format("他们说,{0},{1},都这样说，说明{2}很好", name, desc, keyWord);
//Console.WriteLine(res);//模板字符串
//string name = "张三";
//string desc = "是个好人";
//string keyWord = "人品";
//string res = $"他们说，{name},{desc},都这样说,说明{keyWord}很好";
//Console.WriteLine(res);//字符串-去空格
string name = "  zhang san  ";
string desc = "学生";
Console.WriteLine(name+desc);
Console.WriteLine(name.Trim() + desc);//去掉头部和尾部的空格
Console.WriteLine(name.TrimStart() + desc);//去掉头部的空格
Console.WriteLine(name.TrimEnd() + desc);//去掉尾部的空格
//如何去掉中间的空格
//可以使用Replace方法
Console.WriteLine(name.Replace(" ", "") + desc);//字符串分割
string path = "/home/app/web";
string[] arr = path.Split('/', StringSplitOptions.RemoveEmptyEntries);
foreach (string item in arr)
{Console.WriteLine(item);
}