StringBuilder erase the last character

stringbuilder met stitching XXx; XXX; when such characters, often need to remove the last character can be achieved by remove (starting index number removed right).

 

 1                 StringBuilder sb = new StringBuilder();
 2                 //课程
 3                 if (item.ExamPaperCategory == 0)
 4                 {
 5                     sb.Append("课程名称：");
 6                     var codes = item.ExamPaperCode.Split(";");
 7                     var courses = from a in db.DltBdCourse
 8                                   where codes.Contains(a.CourseCode)
 9                                   select a;
10                     foreach (var course in courses)
11                     {
12                         sb.Append(course.CourseName+"/");
13                     }
14                     sb.Remove(sb.Length - 1, 1);
15                 }