public void GetIndex()
{
var students = new Student[]
{
new Student {
No = 1, Name = "李1", Score = 22.1
},
new Student {
No = 2, Name = "李2", Score = 32.3
},
new Student {
No = 3, Name = "李3", Score = 42.5
}
};
var sqList = new SequenceList <Student>(students);
var index = sqList.GetIndex(students[1]);
}