MissingMethodException：找不到方法

Question

Just not able to understand why I am getting this error. I have code and trying to implement indexer:

public class BOCollection<TKey, TValue>
{
    IDictionary<TKey, TValue> _privateDictionary = new Dictionary<TKey, TValue>();
    public TValue this[TKey key]
   {
        get{return _privateDictionary[key];}
        set{_privateDictionary[key] = value;}
    }

//Dictionary Methods
//Other methods
}

There is no compile time error, but getting run time error:

Method not found: 'System.Collections.Generic.Dictionary`2 NGC.BO.Base.BOBaseClass.get_Child()'.

Answer 1

Your indexer is fine. Seems that your collection have some object(s) that are missing required implementation of Child property.

Answer 2

So another solution to this could be, because I experienced this. I have a project depending on a few other projects. The main project also had reference to one of the other projects - how ever - it did not use it.

So when I deleted the reference in the main object, the problem disappeared. I have a feeling the reason is that the main object is built last and therefor it overwrites the newly built otherproject.dll with it's own otherproject.dll ... because it is not being used.

So my suggestion is: Go over your references and check if it is being used in the project or not. If it isn't - remove it all together.