学步园

public interface IRepository<T> where T : class
{
    IQueryable<T> GetQuery();
    IEnumerable<T> GetAll();
    IEnumerable<T> Find(Expression<Func<T, bool>> where);
    T Single(Expression<Func<T, bool>> where);
    void Delete(T entity);
    void Add(T entity);
}
public class BaseRepository<TEntity> : IRepository<TEntity> where TEntity : class
{
   readonly IObjectContext _objectContext = null;
   readonly IObjectSet<TEntity> _objectSet = null;
   public BaseRepository(IObjectContext objectContext)
   {
       if (objectContext == null)
          throw new ArgumentNullException("objectContext");
       _objectContext = objectContext;
       _objectSet = _objectContext.CreateObjectSet<TEntity>();
   }
   public IQueryable<TEntity> GetQuery()
   {
       return _objectSet;
   }
   public IEnumerable<TEntity> GetAll()
   {
      return _objectSet.ToList();
   }
   public IEnumerable<TEntity> Find(Expression<Func<TEntity, bool>> where)
   {
      return _objectSet.Where(where);
   }
   public TEntity Single(Expression<Func<TEntity, bool>> where)
   {
      return _objectSet.SingleOrDefault(where);
   }
   public void Delete(TEntity entity)
   {
      _objectSet.DeleteObject(entity);
   }
   public void Add(TEntity entity)
   {
      _objectSet.AddObject(entity);
   }
}