Merge branch 'develop5.0-tmd' of http://52.130.252.100:10000/TEAMMODEL/TEAMModelOS into develop5.0-tmd

TEAMModelOS.SDK/Models/Service/StatisticsService.cs

@@ -400,7 +400,7 @@ namespace TEAMModelOS.SDK
                 {
                     train.classTime += 5;
                 }
-                train.teacherClasses.Add(new Models.TeacherClass {url=files.url,score=files.score,hash=files.hash,name=files.name,size=files.size });
+                train.teacherClasses= new List<TeacherClass> { new Models.TeacherClass { url = files.url, score = files.score, hash = files.hash, name = files.name, size = files.size } };
             }
             return train;
         }