ardalis · Copilot · Oct 17, 2025 · Oct 17, 2025 · Oct 17, 2025
diff --git a/01-VerticalSlice/Directory.Build.props b/01-VerticalSlice/Directory.Build.props
@@ -0,0 +1,8 @@
+<Project>
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+  <!-- DO NOT change TargetFramework from net10.0 without explicit approval -->
+</Project>
diff --git a/01-VerticalSlice/aspire/OrderDemo.AppHost/OrderDemo.AppHost.csproj b/01-VerticalSlice/aspire/OrderDemo.AppHost/OrderDemo.AppHost.csproj
@@ -4,9 +4,6 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net9.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
     <UserSecretsId>47f99468-f41d-48b8-ae3f-69682954d973</UserSecretsId>
   </PropertyGroup>
 

diff --git a/01-VerticalSlice/global.json b/01-VerticalSlice/global.json
@@ -0,0 +1,7 @@
+{
+  "sdk": {
+    "version": "10.0.100-rc.2.25502.107",
+    "rollForward": "latestMinor",
+    "allowPrerelease": true
+  }
+}
diff --git a/01-VerticalSlice/src/OrderDemo.Api/OrderDemo.Api.csproj b/01-VerticalSlice/src/OrderDemo.Api/OrderDemo.Api.csproj
@@ -1,9 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
-    <Nullable>enable</Nullable>
-    <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
   <ItemGroup>

diff --git a/01-VerticalSlice/src/ServiceDefaults/ServiceDefaults.csproj b/01-VerticalSlice/src/ServiceDefaults/ServiceDefaults.csproj
@@ -1,9 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>

diff --git a/02-CleanArchitecture/Directory.Build.props b/02-CleanArchitecture/Directory.Build.props
@@ -10,4 +10,5 @@
   <PropertyGroup>
     <NoWarn>1591</NoWarn> <!-- Remove this to turn on warnings for missing XML Comments -->
   </PropertyGroup>
+  <!-- DO NOT change TargetFramework from net10.0 without explicit approval -->
 </Project>
diff --git a/02-CleanArchitecture/global.json b/02-CleanArchitecture/global.json
@@ -1,7 +1,7 @@
 {
   "sdk": {
-    "version": "9.0.110",
+    "version": "10.0.100-rc.2.25502.107",
     "rollForward": "latestMinor",
-    "allowPrerelease": false
+    "allowPrerelease": true
   }
 }
diff --git a/...Architecture/tests/OrderDemo.CleanArch.AspireTests/OrderDemo.CleanArch.AspireTests.csproj b/...Architecture/tests/OrderDemo.CleanArch.AspireTests/OrderDemo.CleanArch.AspireTests.csproj
@@ -1,9 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
   </PropertyGroup>

diff --git a/02-backup/Directory.Build.props b/02-backup/Directory.Build.props
@@ -1,8 +1,9 @@
 <Project>
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>
+  <!-- DO NOT change TargetFramework from net10.0 without explicit approval -->
 </Project>
diff --git a/02-backup/global.json b/02-backup/global.json
@@ -0,0 +1,7 @@
+{
+  "sdk": {
+    "version": "10.0.100-rc.2.25502.107",
+    "rollForward": "latestMinor",
+    "allowPrerelease": true
+  }
+}
diff --git a/README.md b/README.md
@@ -51,15 +51,15 @@ Each folder is a **complete, runnable example** of the same domain implemented i
 
 ## ⚙️ Prerequisites
 
-- [.NET 9 SDK](https://dotnet.microsoft.com/download/dotnet/9.0) or later  
+- [.NET 10 SDK](https://dotnet.microsoft.com/download/dotnet/10.0)  
 - [Docker Desktop](https://www.docker.com/products/docker-desktop/)  
 - [Visual Studio 2022 17.10+](https://visualstudio.microsoft.com/vs/) or [Rider / VS Code](https://code.visualstudio.com)  
 - [Aspire 9.5+](https://learn.microsoft.com/en-us/dotnet/aspire/overview) for local container orchestration  
 
 Optionally you may find the Aspire App Templates helpful. Install them with:
 
 ```bash
-dotnet new install Aspire.ProjectTemplates@9.5.1
+dotnet new install Aspire.ProjectTemplates::10.0.0-*
 ```
 
 ---
@@ -98,8 +98,8 @@ dotnet run
 
 ## 🧰 Technologies Used
 
-- **.NET 9 / 10 Preview**
-- **EF Core 9** for data access
+- **.NET 10**
+- **EF Core 10** for data access
 - **Mediator** (Martin Costello’s library) for in-process messaging
 - **Aspire** for local orchestration and observability
 - **Swagger / Minimal APIs**

diff --git a/demoplan.md b/demoplan.md
@@ -11,7 +11,7 @@ Each demo will be placed in a numbered subfolder (e.g., `01-VerticalSlice`).
 
 ## Common Demo Requirements
 
-- [ ] **Development Environment**: Ensure all demos are built using .NET 9 or later.
+- [ ] **Development Environment**: Ensure all demos are built using .NET 10.
 - [ ] **Aspire**: All demo apps will use Aspire 9.5.1 or later, with Aspire's `AspireAppHostBuilderExtensions` package installed.
 - [ ] **Database**: Use a SQL Server database in an Aspire-managed docker container.
 - [ ] **API Design**: All demos should expose RESTful APIs for core functionality, and support Scalar for API documentation. APIs will always return DTOs, not entities or domain types.