//Console.ReadKey();
ceshi("3.ini", "用户名");
ceshi("3.ini", "IP地址");
ceshi("3.ini", "端口");
// 从ini格式的文件(每行是”键=值”格式)中读取配置项的值，
//编写一个函数来读这些文件，读取指定文件的某个项的值
Console.ReadKey();
}
static void ceshi(string filepath, string namefile) {
string[] host = File.ReadAllLines(@"C:\Users\Administrator\Desktop\3.ini", Encoding.Default);
foreach (string i in host) {
string[] cun = i.Split(new string[] { "=" }, StringSplitOptions.RemoveEmptyEntries);
string name = cun[0].Trim(); //键
string value = cun[1].Trim();//值
if (name == namefile) {
Console.WriteLine("{0}=>{1}", value, namefile);

            }