static void Main(string args) 
{ 
ClassList listClass = new ClassList(); Console.writeLine("请输入第个字符串"); string a = Console.ReadLine(); Console.writeLine("请输入第二个字符串"); string b = Console.ReadLine(); foreach (string n in listClass.strList(a, b)) 
{ Console.writeLine(n); 
} ｝class ClassList { public List strList(string str1,string str2) { string stra = str1 + str2; string strb = str2 + str1; string strc = str1 + str1; List listStr = new List(); listStr.Add(stra); listStr.Add(strb); listStr.Add(strc); return listStr; 
} }
