Modify the value of Dictionary in circle

    Modify the Value like this：Dictionary[key]  = newvalue;

    in common sense ,we modify the value in circle hitting our head 

    foreach(KeyValuePair<Tkey,Tvalue> keys in Dictionary<Tkey,Tvalue>)

   {

             //modify the value you wanted;

   }

    doing this ,we have got an error saying the directionay had changed

  

  so  we do it like this;

  first collect its keys to get a list

  List<Tkey >  list = new List<Tkey >()

  foreach(var key in Dictionary<Tkey,Tvalue>)

 {

        list.add(key);

 }

 

  then  ,we can modify the values by its keys as stated earlier;

  foreach(var key in list)

 {

        Directionay[key]  = newValue;

 }

 ok,now ,we can finish the work without errors

 

 of course ,we can use the dataset to implement our minds,here ,i just want to show one ways ;