1. using System;
2. using System.Collections.Generic;
3. using System.Linq;
4. using System.Linq.Expressions;
5. using System.Text;
6. using System.Threading.Tasks;
7.  
8. namespace Pasted.DataAccess
9. {
10.     public interface IRepository
11.     {
12.         /// <summary>
13.         /// Gets all.
14.         /// </summary>
15.         /// <typeparam name="TEntity">The type of the entity.</typeparam>
16.         /// <returns></returns>
17.         IEnumerable<TEntity> GetAll<TEntity>() where TEntity : class;
18.  
19.         /// <summary>
20.         /// Finds entities based on provided criteria.
21.         /// </summary>
22.         /// <typeparam name="TEntity">The type of the entity.</typeparam>
23.         /// <param name="criteria">The criteria.</param>
24.         /// <returns></returns>
25.         IEnumerable<TEntity> Find<TEntity>(Expression<Func<TEntity, bool>> criteria) where TEntity : class;
26.  
27.         /// <summary>
28.         /// Finds one entity based on provided criteria.
29.         /// </summary>
30.         /// <typeparam name="TEntity">The type of the entity.</typeparam>
31.         /// <param name="criteria">The criteria.</param>
32.         /// <returns></returns>
33.         TEntity FindOne<TEntity>(Expression<Func<TEntity, bool>> criteria) where TEntity : class;
34.  
35.         /// <summary>
36.         /// Adds the specified entity.
37.         /// </summary>
38.         /// <typeparam name="TEntity">The type of the entity.</typeparam>
39.         /// <param name="entity">The entity.</param>
40.         void Add<TEntity>(TEntity entity) where TEntity : class;
41.  
42.         /// <summary>
43.         /// Updates changes of the existing entity.
44.         /// The caller must later call SaveChanges() on the repository explicitly to save the entity to database
45.         /// </summary>
46.         /// <typeparam name="TEntity">The type of the entity.</typeparam>
47.         /// <param name="entity">The entity.</param>
48.         void Update<TEntity>(TEntity entity) where TEntity : class;
49.  
50.         /// <summary>
51.         /// Deletes the specified entity.
52.         /// </summary>
53.         /// <typeparam name="TEntity">The type of the entity.</typeparam>
54.         /// <param name="entity">The entity.</param>
55.         void Delete<TEntity>(TEntity entity) where TEntity : class;
56.     }
57. }
58.