system.invalidoperationexception集合被修改枚举操作可能无法System.Collections.Generic.Dictionary

Question

执行

我得到这个错误在这行

错误说：

system.invalidoperationexception集合被修改枚举操作可能无法在System.Collections.Generic.Dictionary“2.ValueCollection.Enumerator.MoveNext执行<>

线，我有错误在

foreach (ISkill skill in client.Spells.Values) 

当我试图用for更换foreach我有三个错误

UPDATE：我的全码

public static void SaveSpells(GameState client) 
    { 
     if (client.Fake) return; 
     if (client.TransferedPlayer) return; 
     if (((client.Entity != null) && (client.Spells != null)) && (client.Spells.Count != 0)) 
     { 


      foreach (ISkill skill in client.Spells.Values) 
      { 
       DeadPool.Database.MySqlCommand command; 
       if (skill.Available) 
       { 
        // if (skill.PreviousLevel != skill.Level) 
        { 
         command = new DeadPool.Database.MySqlCommand(MySqlCommandType.UPDATE); 
         command.Update("skills").Set("LevelHu2", skill.LevelHu2).Set("LevelHu", (long)skill.Souls).Set("Level", (long)skill.Level).Set("PreviousLevel", (long)skill.Level).Set("PreviousLevel", (long)skill.PreviousLevel).Set("Experience", (long)skill.Experience).Where("EntityID", (long)client.Entity.UID).And("ID", (long)skill.ID).Execute(); 
        } 
       } 
       else 
       { 
        skill.Available = true; 
        command = new DeadPool.Database.MySqlCommand(MySqlCommandType.INSERT); 
        command.Insert("skills").Set("LevelHu2", skill.LevelHu2).Set("LevelHu2", skill.LevelHu2).Insert("LevelHu", (long)skill.Souls).Insert("Level", (long)skill.Level).Insert("PreviousLevel", (long)skill.Level).Insert("Experience", (long)skill.Experience).Insert("EntityID", (long)client.Entity.UID).Insert("ID", (long)skill.ID).Execute(); 
       } 
      } 
     } 
    } 

Answer 1

我在循环里怀疑你正在修改的集合，这是引起例外。

foreach不允许突变你的迭代，用for代替。