Add list of generic type that implements and interface to a dictionary that has a value of the same interface

  • Thread starter Thread starter muchotako
  • Start date Start date
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muchotako

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I have this code:

private Dictionary<Type, List<ICacheable>> cachedEntities;

public ICacheable GetFromCache<T>(Expression<Func<T, bool>> predicate) where T : ICacheable
{
var type = typeof(T);

if (!cachedEntities.ContainsKey(type))
cachedEntities.Add(type, new List<T>());

var entitiesList = cachedEntities[type].AsQueryable();
var result = entitiesList.Where(predicate);

return result;
}

I'm getting an error when trying to add the new List<T> to the dictionary claiming that it can't convert from T to ICacheable, but I force T to implement, so I'm not really understanding why I'm getting it.

I'm also getting an error in the entitiesList.Where(predicate) claiming it can't convert from Expression<Func<T,bool>> to Expression<Func<ICacheable, int, bool>>.

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