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DAL/Repositories/FoorumRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using DAL.Domain;
+using DAL.Interfaces;
+
+namespace DAL.Repositories
+{
+    public class FoorumRepository: RepositoryBase<Foorum>, IFoorumRepository
+    {
+        public FoorumRepository(IFoorumDbContext ctx): base(ctx) { }
+    }
+}

DAL/Repositories/PostRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using DAL.Domain;
+using DAL.Interfaces;
+
+namespace DAL.Repositories
+{
+    public class PostRepository: RepositoryBase<Post>, IPostRepository
+    {
+        public PostRepository(IFoorumDbContext ctx) : base(ctx) { }
+    }
+}

DAL/Repositories/RepositoryBase.cs

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+using System;
+using System.Collections.Generic;
+using System.Data.Entity;
+using System.Linq;
+using System.Linq.Expressions;
+using DAL.Interfaces;
+
+namespace DAL.Repositories
+{
+    public class RepositoryBase<T> where T : class
+    {
+        protected DbContext RepositoryDataContext;
+        protected DbSet<T> RepositoryDbSet;
+
+
+        public RepositoryBase(IFoorumDbContext dbContext)
+        {
+            RepositoryDataContext = dbContext as DbContext;
+            if (RepositoryDataContext == null)
+            {
+                throw new ArgumentNullException(paramName: nameof(dbContext));
+            }
+            RepositoryDbSet = RepositoryDataContext.Set<T>();
+            if (RepositoryDbSet == null)
+            {
+                throw new NullReferenceException(message: nameof(RepositoryDbSet));
+            }
+        }
+
+        public T Add(T entity)
+        {
+            var ret = RepositoryDbSet.Add(entity);
+            SaveChanges();
+            return ret;
+        }
+
+        public T Update(T entity)
+        {
+            RepositoryDbSet.Attach(entity);
+            RepositoryDataContext.Entry(entity).State = EntityState.Modified;
+            return entity;
+        }
+
+        public void Delete(T entity)
+        {
+            RepositoryDbSet.Remove(entity);
+        }
+
+        public void Delete(Expression<Func<T, bool>> where)
+        {
+            IEnumerable<T> objects = RepositoryDbSet.Where<T>(where).AsEnumerable();
+            foreach (T obj in objects)
+                RepositoryDbSet.Remove(obj);
+        }
+
+        public T GetById(int id)
+        {
+            return RepositoryDbSet.Find(id);
+        }
+
+        public virtual IEnumerable<T> GetAll()
+        {
+            return RepositoryDbSet.ToList();
+        }
+
+        public virtual IEnumerable<T> GetMany(Expression<Func<T, bool>> where)
+        {
+            return RepositoryDbSet.Where(where).ToList();
+        }
+
+        public T Get(Expression<Func<T, bool>> where)
+        {
+            return RepositoryDbSet.Where(where).FirstOrDefault<T>();
+        }
+        public int SaveChanges()
+        {
+            return RepositoryDataContext.SaveChanges();
+        }
+    }
+}