Add project files.

ConstructorApp.DataAccessLayer/EntityFramework/EfTestimonialDal.cs

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+using ConstructorApp.DataAccessLayer.Abstract;
+using ConstructorApp.DataAccessLayer.Concrete;
+using ConstructorApp.DataAccessLayer.Repositories;
+using ConstructorApp.EntityLayer.Entities;
+
+namespace ConstructorApp.DataAccessLayer.EntityFramework
+{
+    public class EfTestimonialDal : GenericRepository<Testimonial>, ITestimonialDal
+    {
+        private readonly ConstructorContext context;
+        public EfTestimonialDal(ConstructorContext context) : base(context)
+        {
+            this.context = context;
+        }
+
+        public int CountAll()
+        {
+            return context.Testimonials.Count(x => x.Status != TestimonialStatus.Cancelled);
+        }
+
+        public void TestimonialStatusActive(int id)
+        {
+            var values = context.Testimonials.Find(id);
+            values.Status = TestimonialStatus.Confirmed;
+            context.SaveChanges();
+        }
+
+        public void TestimonialStatusPassive(int id)
+        {
+            var values = context.Testimonials.Find(id);
+            values.Status = TestimonialStatus.Cancelled;
+            context.SaveChanges();
+        }
+    }
+}