Create New List From Existing Lists Comparison

Question

I have two lists:

List<Course> studentCourses = Course.GetCourses(student.PIDM, GetTermCode());  
List<OfferedCourse> offeredCourses = OfferedCourse.GetOfferedCourses();

studentCourses have the properties SubjectCode and CourseNumber .
offeredCourses also have the properties SubjectCode and CourseNumber .

I want to create a third list of type List<Course> that contains only items from studentCourses that match both the SubjectCode and CourseNumber of an item in offeredCourses .

Any help would be greatly appreciated.

Answer 1

Linq为此使用了非直观的语法：use Contains可能包含您所追求的值的集合中的Contains 。

var result = studentCourses.Where(c => offeredCourses.Contains(o => o.SubjectCode == c.SubjectCode && o.CourseNumber == c.CourseNumber));

Answer 2

The solution ended up being:

IEnumerable<Course> courses = studentCourses.Where(sc => offeredCourses.Any(oc => oc.SubjectCode == sc.SubjectCode && oc.CourseNumber == sc.CourseNumber));

A big thank you to cosmo0 who pointed me in the right direction and Magnus who double checked my work!