ContextStrategy.cs

public class ContextStrategy<TResponse, TRequest, TSearch>
{
    private IStrategy<TResponse, TRequest> _strategy;
    private readonly Dictionary<TSearch, IStrategy<TResponse, TRequest>> _dicStrategy = new Dictionary<TSearch, IStrategy<TResponse, TRequest>>();

    public void AddList(TSearch op, IStrategy<TResponse, TRequest> str)
    {
        _dicStrategy.Add(op, str);
    }

    public void SetStrategy(TSearch op)
    {
        _strategy = _dicStrategy.FirstOrDefault(x => x.Key.GetHashCode() == op.GetHashCode()).Value;
    }

    public TResponse Execute(TRequest request)
    {
        if (_strategy == null)
            return default(TResponse);
            
        var stratg = _strategy.GetType();
        var notify = stratg.GetMethod("Execute");
        var instance = Activator.CreateInstance(_strategy.GetType());
            
        return (TResponse)notify.Invoke(instance, new object[] { request });
    }
}