C# 不符合1）和2）的所有其他项目按其标签字母顺序排序。例如；item0:tag=“苹果”；第1项：标记=“小时”；项2:tag=“event”…string variable=“event”。。。最终订单：项目2、项目0、项目1 EDIT: providin

不符合1）和2）的所有其他项目按其标签字母顺序排序。例如；item0:tag=“苹果”；第1项：标记=“小时”；项2:tag=“event”…string variable=“event”。。。最终订单：项目2、项目0、项目1

EDIT: providing example for clarification:
item0: tag = "apple", isChecked = false;
item1: tag = "apple", isChecked = true;
item2: tag = "pineapple", isChecked = false;
item3: tag = "coconut", isChecked = true;
item4: tag = "cherry", isChecked = false;

string is: "cherry"
outcome: item1, item3, item4, item0, item2

 // Retrieve an IQueryable for the colleciton with your specified conditions
 var query = from c in collection
             orderby c.IsChecked descending, c.Tag.Equals("cherry") descending, c.obsTag
             select c;

 // Clear the collection
 collection = new ObservableCollection<myCollectionObject>();
 // Replace the collection with your IQueryable results
 foreach(myCollectionObject obj in query) {
      collection.Add(obj);
 }

 collection = new ObservableCollection<obsCol>(from c in collection 
              orderby c.obsCheck descending, c.obsTag.Equals("cherry") descending, c.obsTag 
 select c);