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VizhTalk.Learning.Domain/Entities/Language.cs

@@ -41,6 +41,18 @@ public class Language : Entity<LanguageId>, IAggregateRoot
     public Course UpdateCourse(Course course)
     {
         var _course = _courses.FirstOrDefault(x => x.Id == course.Id) ?? throw new CourseNotFoundException(Title);
-        throw new Exception();
+        if(course.Image != null)
+            _course.SetImage(course.Image);
+        _course.SetTitle(course.Title);
+
+        if(_course.Order != course.Order)
+        {
+            var orderCourses = _courses.Where(x => x.Id != course.Id)
+            .OrderBy(x => x.Order)
+            .ToList();
+            _course.SetOrder(_course.Order);
+            orderCourses.Insert(course.Order, _course);
+        }
+        return _course;
     }
 }