Use IAsyncEnumerable instead of Task<IEnumerable>

Author: izzat5233

src/Controller/UserController.cs

@@ -50,7 +50,7 @@ public async Task FindAndDeleteProductAsync()
     public async Task DisplayProductsAsync()
     {
         var number = 1;
-        foreach (var product in await _repository.GetAllProductsAsync())
+        await foreach (var product in _repository.GetAllProductsAsync())
         {
             Console.WriteLine($"[{number++}] {product}");
         }

src/DAO/MemoryProductDao.cs

@@ -7,17 +7,19 @@ public class MemoryProductDao : IProductDao
 {
     private readonly List<Product> _products = [];
 
-    public Task<IEnumerable<Product>> GetAllProductsAsync()
+    public async IAsyncEnumerable<Product> GetAllProductsAsync()
     {
-        return Task.FromResult(_products.AsEnumerable());
+        foreach (var product in _products)
+        {
+            yield return product;
+        }
     }
 
     public Task<Product?> GetProductByNameAsync(string productName)
     {
         return Task.FromResult(_products.FirstOrDefault(p => p.Name == productName));
     }
 
-
     public Task DeleteProductByNameAsync(string productName)
     {
         _products.RemoveAll(p => p.Name == productName);

src/Interfaces/IProductDao.cs

@@ -4,7 +4,7 @@ namespace SimpleInventoryManagementSystem.Interfaces;
 
 public interface IProductDao
 {
-    Task<IEnumerable<Product>> GetAllProductsAsync();
+    IAsyncEnumerable<Product> GetAllProductsAsync();
     Task<Product?> GetProductByNameAsync(string productName);
     Task DeleteProductByNameAsync(string productName);
     Task AddProductAsync(Product product);

src/Interfaces/IProductRepository.cs

@@ -4,7 +4,7 @@ namespace SimpleInventoryManagementSystem.Interfaces;
 
 public interface IProductRepository
 {
-    Task<IEnumerable<Product>> GetAllProductsAsync();
+    IAsyncEnumerable<Product> GetAllProductsAsync();
     Task<Product?> GetProductByNameAsync(string productName);
     Task DeleteProductByNameAsync(string productName);
     Task AddProductAsync(Product product);

src/Repository/ProductRepository.cs

@@ -8,8 +8,8 @@ public class ProductRepository : IProductRepository
     private readonly IProductDao _productDao;
     public ProductRepository(IProductDao productDao) => _productDao = productDao;
 
-    public async Task<IEnumerable<Product>> GetAllProductsAsync() =>
-        await _productDao.GetAllProductsAsync();
+    public IAsyncEnumerable<Product> GetAllProductsAsync() =>
+        _productDao.GetAllProductsAsync();
 
     public async Task<Product?> GetProductByNameAsync(string productName) =>
         await _productDao.GetProductByNameAsync(productName);