how to break out the nested for loop

 Action job = () =>            {                foreach (Assembly a in AppDomain.CurrentDomain.GetAssemblies())                {                    foreach (Type t in a.GetTypes())                    {                        if (t.Name.ToLower().Contains(keyword.ToLower()))                        {                            typeFullName = t.FullName;                            return;                        }                    }                }            };            job();