class Student 
 {
 public int Id { get; set; }
 public string Name { get; set; }
 public string Gender { get; set; }
 }

static void Main (string[] args) 
 {
  //创建数组
  Student[] StudentArray = new Student[3];
  //创建创建3个student对象，并赋值给数组的每一个元素  StudentArray[0] = new Student()
  {
  Id = 203,
  Name ="Tony Stark",
  Gender ="Male"
  };
  StudentArray[1] = new Student()
  {
  Id = 205,
  Name="Hulk",
  Gender = "Male"
  };
  StudentArray[2] = new Student() 
  {
  Id = 210,
  Name ="Black Widow",
  Gender="Female"
  };

foreach (Student student in StudentArray)
 {
 Console.WriteLine("Id = "+student.Id+" "+" Name = "+student.Name+" "+" Gender = "+student.Gender);
 }

List<Student> StudentList = StudentArray.ToList<Student>();

List<Student> StudentList = StudentArray.ToList<Student>();
foreach (Student student in StudentList)
 {
 Console.WriteLine("Id = "+student.Id+" "+" Name = "+student.Name+" "+" Gender = "+student.Gender);
 }

Student[] ListToArray = StudentList.ToArray<Student>();

foreach (Student student in ListToArray)
{
 Console.WriteLine("Id = "+student.Id+" "+" Name = "+student.Name+" "+" Gender = "+student.Gender);
}

StudentArray.ToDictionary(key => key.Id,Studentobj => Studentobj);

Dictionary<int, Student> StudentDictionary = StudentArray.ToDictionary(key => key.Id,Studentobj => Studentobj);

foreach (KeyValuePair<int, Student> student in StudentDictionary)
{
 Console.WriteLine("Id = "+student.Key+" "+" Name = "+student.Value.Name+" "+" Gender = "+student.Value.Gender);
}

Student[] DictionaryToArray = StudentDictionary.Values.ToArray();

foreach (Student student in DictionaryToArray)
{
 Console.WriteLine("Id = "+student.Id+" "+" Name = " +student.Name+" "+" Gender = "+student.Gender);
}

Dictionary<int, Student> ListToDictionary = StudentList.ToDictionary(key => key.Id, value => value);

foreach (KeyValuePair<int,Student> student in ListToDictionary)
{
 Console.WriteLine("Id = "+student.Key+" "+" Name = " +student.Value.Name+" "+" Gender = "+student.Value.Gender);
}

List<Student> DictionaryToList = StudentDictionary.Values.ToList();
foreach (Student student in DictionaryToList)
{
 Console.WriteLine("Id = "+student.Id+" "+" Name = "+student.Name+" "+" Gender = "+student.Gender);
}