diff --git a/.vs/ReCapProject/v16/.suo b/.vs/ReCapProject/v16/.suo
index 470c621..22bb5f5 100644
Binary files a/.vs/ReCapProject/v16/.suo and b/.vs/ReCapProject/v16/.suo differ
diff --git a/Business/Abstract/IBrandService.cs b/Business/Abstract/IBrandService.cs
index 86f88fd..8376008 100644
--- a/Business/Abstract/IBrandService.cs
+++ b/Business/Abstract/IBrandService.cs
@@ -1,4 +1,5 @@
-using Entities.Concrete;
+using Core.Utilities.Results;
+using Entities.Concrete;
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -7,9 +8,10 @@ namespace Business.Abstract
 {
     public interface IBrandService
     {
-        List<Brand> GetAll();
-        void Add(Brand brand);
-        void Update(Brand brand);
-        void Delete(Brand brand);
+        IDataResult<List<Brand>> GetAll();
+        IDataResult<Brand> GetById(int id);
+        IResult Add(Brand brand);
+        IResult Delete(Brand brand);
+        IResult Update(Brand brand);
     }
 }
diff --git a/Business/Abstract/ICarService.cs b/Business/Abstract/ICarService.cs
index 3a36cef..69bd1f6 100644
--- a/Business/Abstract/ICarService.cs
+++ b/Business/Abstract/ICarService.cs
@@ -1,4 +1,5 @@
-using Entities.Concrete;
+using Core.Utilities.Results;
+using Entities.Concrete;
 using Entities.DTOs;
 using System;
 using System.Collections.Generic;
@@ -8,12 +9,13 @@ namespace Business.Abstract
 {
     public interface ICarService
     {
-        List<Car> GetAll();
-        List<Car> GetCarsByBrandId(int id);
-        List<Car> GetCarsByColorId(int id);
-        List<CarDetailDto> GetCarDetails();
-        void Add(Car car);
-        void Update(Car car);
-        void Delete(Car car);
+        IDataResult<List<Car>> GetAll();
+        IDataResult<Car> GetById(int id);
+        IDataResult<List<Car>> GetCarsByBrandId(int id);
+        IDataResult<List<Car>> GetCarsByColorId(int id);
+        IDataResult<List<CarDetailDto>> GetCarDetails();
+        IResult Add(Car car);
+        IResult Delete(Car car);
+        IResult Update(Car car);
     }
 }
diff --git a/Business/Abstract/IColorService.cs b/Business/Abstract/IColorService.cs
index 4c25fab..f78aaaa 100644
--- a/Business/Abstract/IColorService.cs
+++ b/Business/Abstract/IColorService.cs
@@ -1,4 +1,5 @@
-using Entities.Concrete;
+using Core.Utilities.Results;
+using Entities.Concrete;
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -7,10 +8,10 @@ namespace Business.Abstract
 {
     public interface IColorService
     {
-        List<Color> GetAll();
-        Color GetById(int id);
-        void Add(Color color);
-        void Update(Color color);
-        void Delete(Color color);
+        IDataResult<List<Color>> GetAll();
+        IDataResult<Color> GetById(int id);
+        IResult Add(Color color);
+        IResult Delete(Color color);
+        IResult Update(Color color);
     }
 }
diff --git a/Business/Concrete/BrandManager.cs b/Business/Concrete/BrandManager.cs
index 70be51a..57af57c 100644
--- a/Business/Concrete/BrandManager.cs
+++ b/Business/Concrete/BrandManager.cs
@@ -1,4 +1,6 @@
 using Business.Abstract;
+using Business.Constans;
+using Core.Utilities.Results;
 using DataAccess.Abstract;
 using Entities.Concrete;
 using System;
@@ -16,24 +18,38 @@ public BrandManager(IBrandDal brandDal)
         {
             _brandDal = brandDal;
         }
-        public void Add(Brand brand)
+        public IResult Add(Brand brand)
         {
-            _brandDal.Add(brand);
+           _brandDal.Add(brand);
+           return new SuccessResult(Messages.BrandAdded);
+            
         }
-
-        public void Delete(Brand brand)
+        public IResult Delete(Brand brand)
         {
             _brandDal.Delete(brand);
+            return new Result(true, Messages.BrandDeleted);
+        }
+
+        public IDataResult<List<Brand>> GetAll()
+        {
+            return new SuccessDataResult<List<Brand>>
+                (_brandDal.GetAll(),Messages.BrandListed);
         }
 
-        public List<Brand> GetAll()
+        public IDataResult<Brand> GetById(int id)
         {
-            return _brandDal.GetAll();
+            return new SuccessDataResult<Brand>
+                (_brandDal.Get(b => b.BrandId == id));
         }
 
-        public void Update(Brand brand)
+        public IResult Update(Brand brand)
         {
+            if (brand.BrandName == null)
+            {
+                return new ErrorResult(Messages.BrandNameNull);
+            }
             _brandDal.Update(brand);
+            return new Result(true, Messages.BrandUpdated);
         }
     }
 }
diff --git a/Business/Concrete/CarManager.cs b/Business/Concrete/CarManager.cs
index 8bd68d8..97abba6 100644
--- a/Business/Concrete/CarManager.cs
+++ b/Business/Concrete/CarManager.cs
@@ -1,4 +1,6 @@
 using Business.Abstract;
+using Business.Constans;
+using Core.Utilities.Results;
 using DataAccess.Abstract;
 using Entities.Concrete;
 using Entities.DTOs;
@@ -16,41 +18,67 @@ public CarManager(ICarDal carDal)
         {
             _carDal = carDal;
         }
-        public void Add(Car car)
+
+        public IResult Add(Car car)
         {
-            if (car.DailyPrice > 0 && car.CarName.Length >= 2)
+            if (car.CarName.Length >= 2)
             {
-                _carDal.Add(car);
+                if (car.DailyPrice > 0)
+                {
+                    _carDal.Add(car);
+                    return new SuccessResult(Messages.CarAdded);
+                }
+                else
+                {
+                    return new ErrorResult(Messages.CarDailyPrice);
+                }
             }
             else
             {
-                Console.WriteLine("Araba adı 2 karakterden büyük ve günlük fiyatı 0'dan büyük olmalıdır.");
+                return new ErrorResult(Messages.CarNameError);
             }
         }
-        public void Delete(Car car)
+
+        public IResult Delete(Car car)
         {
             _carDal.Delete(car);
+            return new SuccessResult(Messages.CarDeleted);
         }
-        public void Update(Car car)
+
+        public IDataResult<List<Car>> GetAll()
         {
-            _carDal.Update(car);
+            return new SuccessDataResult<List<Car>>
+                (_carDal.GetAll(),Messages.CarsListed);
         }
-        public List<Car> GetAll()
+
+        public IDataResult<Car> GetById(int id)
         {
-            return _carDal.GetAll();
+            return new SuccessDataResult<Car>
+                (_carDal.Get(c => c.Id == id));
         }
-        public List<Car> GetCarsByBrandId(int id)
+
+        public IDataResult<List<CarDetailDto>> GetCarDetails()
         {
-            return _carDal.GetAll(c => c.BrandId == id);
+                return new SuccessDataResult<List<CarDetailDto>>
+                (_carDal.GetCarDetails());            
         }
-        public List<Car> GetCarsByColorId(int id)
+
+        public IDataResult<List<Car>> GetCarsByBrandId(int id)
         {
-            return _carDal.GetAll(c => c.ColorId == id);
+            return new SuccessDataResult<List<Car>>
+                (_carDal.GetAll(c => c.BrandId == id));
         }
 
-        public List<CarDetailDto> GetCarDetails()
+        public IDataResult<List<Car>> GetCarsByColorId(int id)
         {
-            return _carDal.GetCarDetails();
+            return new SuccessDataResult<List<Car>>
+                (_carDal.GetAll(c => c.ColorId == id));
+        }
+
+        public IResult Update(Car car)
+        {
+            _carDal.Update(car);
+            return new SuccessResult(Messages.CarUpdated);
         }
     }
 }
diff --git a/Business/Concrete/ColorManager.cs b/Business/Concrete/ColorManager.cs
index 439f1db..fcb57e2 100644
--- a/Business/Concrete/ColorManager.cs
+++ b/Business/Concrete/ColorManager.cs
@@ -1,4 +1,6 @@
 using Business.Abstract;
+using Business.Constans;
+using Core.Utilities.Results;
 using DataAccess.Abstract;
 using Entities.Concrete;
 using System;
@@ -14,29 +16,35 @@ public ColorManager(IColorDal colorDal)
         {
             _colorDal = colorDal;
         }
-        public void Add(Color color)
+
+        public IResult Add(Color color)
         {
             _colorDal.Add(color);
+            return new Result(true, Messages.ColorAdded);
         }
 
-        public void Delete(Color color)
+        public IResult Delete(Color color)
         {
             _colorDal.Delete(color);
+            return new Result(true, Messages.ColorDeleted);
         }
 
-        public List<Color> GetAll()
+        public IDataResult<List<Color>> GetAll()
         {
-            return _colorDal.GetAll();
+            return new SuccessDataResult<List<Color>>
+                (_colorDal.GetAll(),Messages.ColorListed);
         }
 
-        public Color GetById(int id)
+        public IDataResult<Color> GetById(int id)
         {
-            return _colorDal.Get(c => c.ColorId == id);
+            return new SuccessDataResult<Color>
+                (_colorDal.Get(c => c.ColorId == id));
         }
 
-        public void Update(Color color)
+        public IResult Update(Color color)
         {
             _colorDal.Update(color);
+            return new Result(true, Messages.ColorUpdated);
         }
     }
 }
diff --git a/Business/Constans/Messages.cs b/Business/Constans/Messages.cs
new file mode 100644
index 0000000..40fe540
--- /dev/null
+++ b/Business/Constans/Messages.cs
@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Business.Constans
+{
+    public static class Messages
+    {
+        public static string CarAdded = "Araba Eklendi";
+        public static string CarDeleted = "Araba Silindi";
+        public static string CarUpdated = "Araba Güncellendi";
+        public static string AddError = "Ekleme Başarısız Oldu";
+        public static string CarsListed = "Arabalar listelendi";
+        public static string CarDetails = "Araba Detayları Listelendi";
+        public static string CarDailyPrice = "Günlük fiyat 0' dan küçük olamaz";
+        public static string CarNameError = "Araba ismi minimum 2 karakter olmalıdır.";
+
+        public static string BrandAdded = "Marka Eklendi";
+        public static string BrandDeleted = "Marka Silindi";
+        public static string BrandUpdated = "Marka Güncellendi";
+        public static string BrandListed = "Markalar Listelendi";
+        public static string BrandError = "Marka Eklenemedi";
+        public static string BrandUpdateError = "Marka Güncellenemedi";
+        public static string BrandNameNull = "Marka ismi boş olamaz";
+
+        public static string ColorAdded = "Renk Eklendi";
+        public static string ColorDeleted = "Renk Silindi";
+        public static string ColorUpdated = "Renk Güncellendi";
+        public static string ColorListed = "Renkler Listelendi";
+        public static string ColorAddError = "Renk Eklenemedi";
+
+        public static string MaintenanceTime = "Sistem Şuan Bakımda.";
+        public static string Added = "Eklendi";
+        public static string Deleted = "Silindi";
+        public static string Updated = "Güncellendi";
+        public static string Rented = "Kiralandı";
+        public static string InActiveUse = "Araba Kullanımda";
+        internal static string ImageLimitOver = "Her Arabanın en fazla 5 Fotoğrafı Olabilir";
+        internal static string ImageAdded = "Fotoğraf Yüklendi";
+        internal static string CarImageUpdated = "Fotoğraf Güncellendi";
+        internal static string CarImageNotFound = "Fotoğraf Bulunamadı";
+        internal static string CarImageDeleted = "Fotoğraf Silindi";
+    }
+}
diff --git a/Business/bin/Debug/netstandard2.0/Business.dll b/Business/bin/Debug/netstandard2.0/Business.dll
index b4c9d02..5e258fa 100644
Binary files a/Business/bin/Debug/netstandard2.0/Business.dll and b/Business/bin/Debug/netstandard2.0/Business.dll differ
diff --git a/Business/bin/Debug/netstandard2.0/Business.pdb b/Business/bin/Debug/netstandard2.0/Business.pdb
index f474f06..00d31c8 100644
Binary files a/Business/bin/Debug/netstandard2.0/Business.pdb and b/Business/bin/Debug/netstandard2.0/Business.pdb differ
diff --git a/Business/bin/Debug/netstandard2.0/DataAccess.dll b/Business/bin/Debug/netstandard2.0/DataAccess.dll
index 4a2d83e..8d3500b 100644
Binary files a/Business/bin/Debug/netstandard2.0/DataAccess.dll and b/Business/bin/Debug/netstandard2.0/DataAccess.dll differ
diff --git a/Business/bin/Debug/netstandard2.0/DataAccess.pdb b/Business/bin/Debug/netstandard2.0/DataAccess.pdb
index ca16033..6fcb4d1 100644
Binary files a/Business/bin/Debug/netstandard2.0/DataAccess.pdb and b/Business/bin/Debug/netstandard2.0/DataAccess.pdb differ
diff --git a/Business/obj/Debug/netstandard2.0/Business.csproj.CoreCompileInputs.cache b/Business/obj/Debug/netstandard2.0/Business.csproj.CoreCompileInputs.cache
index a44a6b2..8da66fa 100644
--- a/Business/obj/Debug/netstandard2.0/Business.csproj.CoreCompileInputs.cache
+++ b/Business/obj/Debug/netstandard2.0/Business.csproj.CoreCompileInputs.cache
@@ -1 +1 @@
-02044cdbb5c862289fe86fb440e7862b0a192851
+656d0b06cad8785ecf985ee2ad32b557b809e9e9
diff --git a/Business/obj/Debug/netstandard2.0/Business.dll b/Business/obj/Debug/netstandard2.0/Business.dll
index b4c9d02..5e258fa 100644
Binary files a/Business/obj/Debug/netstandard2.0/Business.dll and b/Business/obj/Debug/netstandard2.0/Business.dll differ
diff --git a/Business/obj/Debug/netstandard2.0/Business.pdb b/Business/obj/Debug/netstandard2.0/Business.pdb
index f474f06..00d31c8 100644
Binary files a/Business/obj/Debug/netstandard2.0/Business.pdb and b/Business/obj/Debug/netstandard2.0/Business.pdb differ
diff --git a/ConsoleUI/Program.cs b/ConsoleUI/Program.cs
index ec2847e..e9f9086 100644
--- a/ConsoleUI/Program.cs
+++ b/ConsoleUI/Program.cs
@@ -23,28 +23,37 @@ static void Main(string[] args)
             //car1.Description = "Kia Rio 1.3 motor";
             //carManager.Add(car1);
 
-            foreach (var car in carManager.GetCarDetails())
+            var result = carManager.GetCarDetails();
+            if (result.Success == true)
             {
-                Console.WriteLine($"Araba Adı: {car.CarName}\n" +
-                    $"Araba Günlük Fiyatı: {car.DailyPrice}\n" +
-                    $"Araba Markası: {car.BrandName}\n" +
-                    $"Araba Rengi: {car.ColorName}");
-
+                foreach (var car in result.Data)
+                {
+                    Console.WriteLine($"Araba Adı: {car.CarName}\n" +
+                        $"Araba Günlük Fiyatı: {car.DailyPrice}\n" +
+                        $"Araba Markası: {car.BrandName}\n" +
+                        $"Araba Rengi: {car.ColorName}");
+                }
             }
-
-           /*
-            * BrandManager brandManager = new BrandManager(new EfBrandDal());
-            foreach (var brand in brandManager.GetAll())
+            else
             {
-                Console.WriteLine($"Araba Markası: {brand.BrandName}\n");
+                Console.WriteLine(result.Message);
             }
 
-            ColorManager colorManager = new ColorManager(new EfColorDal());
-            foreach (var color in colorManager.GetAll())
-            {
-                Console.WriteLine($"Araba Rengi: {color.ColorName}\n");
-            }
-           */
+
+
+            /*
+             * BrandManager brandManager = new BrandManager(new EfBrandDal());
+             foreach (var brand in brandManager.GetAll())
+             {
+                 Console.WriteLine($"Araba Markası: {brand.BrandName}\n");
+             }
+
+             ColorManager colorManager = new ColorManager(new EfColorDal());
+             foreach (var color in colorManager.GetAll())
+             {
+                 Console.WriteLine($"Araba Rengi: {color.ColorName}\n");
+             }
+            */
         }
     }
 }
diff --git a/ConsoleUI/bin/Debug/netcoreapp3.1/Business.dll b/ConsoleUI/bin/Debug/netcoreapp3.1/Business.dll
index b4c9d02..5e258fa 100644
Binary files a/ConsoleUI/bin/Debug/netcoreapp3.1/Business.dll and b/ConsoleUI/bin/Debug/netcoreapp3.1/Business.dll differ
diff --git a/ConsoleUI/bin/Debug/netcoreapp3.1/Business.pdb b/ConsoleUI/bin/Debug/netcoreapp3.1/Business.pdb
index f474f06..00d31c8 100644
Binary files a/ConsoleUI/bin/Debug/netcoreapp3.1/Business.pdb and b/ConsoleUI/bin/Debug/netcoreapp3.1/Business.pdb differ
diff --git a/ConsoleUI/bin/Debug/netcoreapp3.1/ConsoleUI.dll b/ConsoleUI/bin/Debug/netcoreapp3.1/ConsoleUI.dll
index 398afde..d05c747 100644
Binary files a/ConsoleUI/bin/Debug/netcoreapp3.1/ConsoleUI.dll and b/ConsoleUI/bin/Debug/netcoreapp3.1/ConsoleUI.dll differ
diff --git a/ConsoleUI/bin/Debug/netcoreapp3.1/ConsoleUI.pdb b/ConsoleUI/bin/Debug/netcoreapp3.1/ConsoleUI.pdb
index f7f8091..d56ab31 100644
Binary files a/ConsoleUI/bin/Debug/netcoreapp3.1/ConsoleUI.pdb and b/ConsoleUI/bin/Debug/netcoreapp3.1/ConsoleUI.pdb differ
diff --git a/ConsoleUI/bin/Debug/netcoreapp3.1/DataAccess.dll b/ConsoleUI/bin/Debug/netcoreapp3.1/DataAccess.dll
index 4a2d83e..8d3500b 100644
Binary files a/ConsoleUI/bin/Debug/netcoreapp3.1/DataAccess.dll and b/ConsoleUI/bin/Debug/netcoreapp3.1/DataAccess.dll differ
diff --git a/ConsoleUI/bin/Debug/netcoreapp3.1/DataAccess.pdb b/ConsoleUI/bin/Debug/netcoreapp3.1/DataAccess.pdb
index ca16033..6fcb4d1 100644
Binary files a/ConsoleUI/bin/Debug/netcoreapp3.1/DataAccess.pdb and b/ConsoleUI/bin/Debug/netcoreapp3.1/DataAccess.pdb differ
diff --git a/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.csproj.AssemblyReference.cache b/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.csproj.AssemblyReference.cache
index 300397e..fb64d58 100644
Binary files a/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.csproj.AssemblyReference.cache and b/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.csproj.AssemblyReference.cache differ
diff --git a/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.dll b/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.dll
index 398afde..d05c747 100644
Binary files a/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.dll and b/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.dll differ
diff --git a/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.pdb b/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.pdb
index f7f8091..d56ab31 100644
Binary files a/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.pdb and b/ConsoleUI/obj/Debug/netcoreapp3.1/ConsoleUI.pdb differ
diff --git a/DataAccess/Concrete/EntityFramework/EfCarDal.cs b/DataAccess/Concrete/EntityFramework/EfCarDal.cs
index e208fa5..40c2265 100644
--- a/DataAccess/Concrete/EntityFramework/EfCarDal.cs
+++ b/DataAccess/Concrete/EntityFramework/EfCarDal.cs
@@ -33,8 +33,6 @@ on c.ColorId equals co.ColorId
                              };
                 return result.ToList();
             }
-
-            
         }
     }
 }
diff --git a/DataAccess/bin/Debug/netstandard2.0/DataAccess.dll b/DataAccess/bin/Debug/netstandard2.0/DataAccess.dll
index 4a2d83e..8d3500b 100644
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diff --git a/DataAccess/bin/Debug/netstandard2.0/DataAccess.pdb b/DataAccess/bin/Debug/netstandard2.0/DataAccess.pdb
index ca16033..6fcb4d1 100644
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diff --git a/DataAccess/obj/Debug/netstandard2.0/DataAccess.dll b/DataAccess/obj/Debug/netstandard2.0/DataAccess.dll
index 4a2d83e..8d3500b 100644
Binary files a/DataAccess/obj/Debug/netstandard2.0/DataAccess.dll and b/DataAccess/obj/Debug/netstandard2.0/DataAccess.dll differ
diff --git a/DataAccess/obj/Debug/netstandard2.0/DataAccess.pdb b/DataAccess/obj/Debug/netstandard2.0/DataAccess.pdb
index ca16033..6fcb4d1 100644
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