Unity Framework Cheat Sheet by mrtgr

var entity = entityRepository.FindById(entity.Id)

//Load with properties
var entity = entityRepository.FindById(entity.Id, x=> x.OtherEntity, t=>t.AnotherEntityCollection);

//Parameterles.
entityRepository.FindAll();

//Get entities which SomeProperty = Predicate
entity.Repository.FindAll(x=>x.SomeProperty == "Predicate");

//Get entity and its Child Collection
entity.Repository.FindAll(x=>x.ChildCollection)

//Get entities which SomeProperty = Predicate and include Child Collection
entity.Repository.FindAll(x=>x.SomeProperty= "Predicate" , t=>t.ChildCollection);

//Entity without a parent
entity = new entity() { ... };
entityRepository.Add(entity);

//Child object that has parent
entity = new entity() { ... , parentId= 3 };
entityRepository.Add(entity);
//OR
//Child Object that has parent
entity = new entity() { ... };
parent = parentRepository.FindyById(parentId);
parent.ChildEntityCollection.Add(entity);

//With Entity Id
someModelRepository.Remove(entity.Id);

//With Entity
someModelRepository.Remove(entity);

//One-To-One Relation
parent.Child = null;

//One-To-Many Relation
parent.ChildCollection.Remove(Child);
//OR
parent.ChildCollection.Clear()

try
{
    using (unitOfWorkFactory.Create())
    {
         //Add, Remove, Modify
    }
}
catch (ModelValidationException mvex)
{
    foreach (var error in mvex.ValidationErrors)
    {
        ModelState.AddModelError(error.MemberNames.FirstOrDefault() ?? "", error.ErrorMessage);
    }
}