diff --git a/ShopSolution.sln b/ShopSolution.sln
index 8eabfe1..e842a86 100644
--- a/ShopSolution.sln
+++ b/ShopSolution.sln
@@ -3,13 +3,13 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.10.35122.118
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Webshop.Api", "Webshop.Api\Webshop.Api.csproj", "{CFC6D39C-5455-4091-8831-A07E34E1EF5F}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Shop.Api", "Webshop.Api\Shop.Api.csproj", "{CFC6D39C-5455-4091-8831-A07E34E1EF5F}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Webshop.Domain", "Webshop.Domain\Webshop.Domain.csproj", "{959C9FF8-13B2-43AD-9795-878D497EB975}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Shop.Domain", "Webshop.Domain\Shop.Domain.csproj", "{959C9FF8-13B2-43AD-9795-878D497EB975}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Webshop.Application", "Webshop.Application\Webshop.Application.csproj", "{48E0F59D-F70D-4AA7-895C-671AD939A4B9}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Shop.Application", "Webshop.Application\Shop.Application.csproj", "{48E0F59D-F70D-4AA7-895C-671AD939A4B9}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Webshop.Infrastructure", "Webshop.Infrastructure\Webshop.Infrastructure.csproj", "{546165FB-7B73-40A5-B774-15CEDFEBB9E8}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Shop.Infrastructure", "Webshop.Infrastructure\Shop.Infrastructure.csproj", "{546165FB-7B73-40A5-B774-15CEDFEBB9E8}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
diff --git a/Webshop.Api/Webshop.Api.csproj b/Webshop.Api/Shop.Api.csproj
similarity index 84%
rename from Webshop.Api/Webshop.Api.csproj
rename to Webshop.Api/Shop.Api.csproj
index 5fa4bdb..dfba4f9 100644
--- a/Webshop.Api/Webshop.Api.csproj
+++ b/Webshop.Api/Shop.Api.csproj
@@ -19,8 +19,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Webshop.Application\Webshop.Application.csproj" />
-    <ProjectReference Include="..\Webshop.Infrastructure\Webshop.Infrastructure.csproj" />
+    <ProjectReference Include="..\Webshop.Application\Shop.Application.csproj" />
+    <ProjectReference Include="..\Webshop.Infrastructure\Shop.Infrastructure.csproj" />
   </ItemGroup>
 
 </Project>
diff --git a/Webshop.Application/Webshop.Application.csproj b/Webshop.Application/Shop.Application.csproj
similarity index 83%
rename from Webshop.Application/Webshop.Application.csproj
rename to Webshop.Application/Shop.Application.csproj
index 2e530f3..521953a 100644
--- a/Webshop.Application/Webshop.Application.csproj
+++ b/Webshop.Application/Shop.Application.csproj
@@ -11,7 +11,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Webshop.Domain\Webshop.Domain.csproj" />
+    <ProjectReference Include="..\Webshop.Domain\Shop.Domain.csproj" />
   </ItemGroup>
 
 </Project>
diff --git a/Webshop.Domain/Interfaces/IProductRepository.cs b/Webshop.Domain/Interfaces/IProductRepository.cs
index 878c86c..84e944b 100644
--- a/Webshop.Domain/Interfaces/IProductRepository.cs
+++ b/Webshop.Domain/Interfaces/IProductRepository.cs
@@ -10,5 +10,6 @@ namespace Webshop.Domain.Interfaces
         Task AddProductAsync(Product product);
         Task UpdateProductAsync(Product product);
         Task DeleteProductAsync(Guid id);
+        Task<bool> ProductExistsBySlugAsync(string slug);
     }
 }
\ No newline at end of file
diff --git a/Webshop.Domain/Webshop.Domain.csproj b/Webshop.Domain/Shop.Domain.csproj
similarity index 100%
rename from Webshop.Domain/Webshop.Domain.csproj
rename to Webshop.Domain/Shop.Domain.csproj
diff --git a/Webshop.Infrastructure/Repositories/ProductRepository.cs b/Webshop.Infrastructure/Repositories/ProductRepository.cs
index fae5337..05bc589 100644
--- a/Webshop.Infrastructure/Repositories/ProductRepository.cs
+++ b/Webshop.Infrastructure/Repositories/ProductRepository.cs
@@ -28,8 +28,13 @@ namespace Webshop.Infrastructure.Repositories
 
         public async Task AddProductAsync(Product product)
         {
-            _context.Products.Add(product);
-            await _context.SaveChangesAsync(); // Wichtig: Änderungen speichern
+            await _context.Products.AddAsync(product);
+            await _context.SaveChangesAsync();
+        }
+
+        public async Task<bool> ProductExistsBySlugAsync(string slug)
+        {
+            return await _context.Products.AnyAsync(p => p.Slug == slug);
         }
 
         public async Task UpdateProductAsync(Product product)
diff --git a/Webshop.Infrastructure/Webshop.Infrastructure.csproj b/Webshop.Infrastructure/Shop.Infrastructure.csproj
similarity index 89%
rename from Webshop.Infrastructure/Webshop.Infrastructure.csproj
rename to Webshop.Infrastructure/Shop.Infrastructure.csproj
index 07beb5a..263b216 100644
--- a/Webshop.Infrastructure/Webshop.Infrastructure.csproj
+++ b/Webshop.Infrastructure/Shop.Infrastructure.csproj
@@ -17,9 +17,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Webshop.Domain\Webshop.Domain.csproj" />
+    <ProjectReference Include="..\Webshop.Domain\Shop.Domain.csproj" />
   </ItemGroup>
 
-
-
 </Project>