What are some examples of LINQ joins in C#?

Can you explain what LINQ joins are in C#?

Sure! LINQ joins allow you to combine data from two or more collections based on a common key.

Can you give me an example of an inner join using LINQ?

Absolutely! Here's a simple example:

var innerJoin = from student in students
                join course in courses on student.CourseId equals course.Id
                select new { student.Name, course.Title }; 

What about a left join? How would that look?

For a left join, you can use the GroupJoin method. Here's an example:

var leftJoin = from student in students
                join course in courses on student.CourseId equals course.Id into courseGroup
                from course in courseGroup.DefaultIfEmpty()
                select new { student.Name, CourseTitle = course?.Title }; 

Thanks! Can you explain the difference between inner and outer joins?

Sure! An inner join returns only the records that have matching values in both collections, while an outer join returns all records from one collection and the matched records from the other, filling in with nulls where there are no matches.