how to show one row from multiple rows with one column havin

Question

Hi I have a Use case in which I have three tables as Teacher table , Courses Table, and TeacherVsCourse Table 

Course_ Id	Name
1	MathMatics
2	Physics

 

The Teacher Table 

Teacher_ID	Teacher_Name
1	AAA
2	BBB

 

The TeacherVsCourses Table

id	Course_id	Teacher_id
1	1	1
2	2	1
3	1	2

 

My Application is having MVC in asp.net architecture Now I am saving individual records into the database table as shown below 

 

you can check the image from here i have tried to add image but it gives error so i upload it here 

https://imgur.com/a/WQLeYjC

 

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what i want onto my view instead of two rows for teacher-id =1 , I need    1 row with comma separated courses how to do it ?