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+# Migration Checks
+
+Electron.NET includes automatic build-time validation checks that help users migrating from previous versions avoid common configuration issues. These checks run automatically during the build process and provide helpful guidance when problems are detected.
+
+## Overview
+
+When you build an Electron.NET project, the following validation checks are performed:
+
+| Code | Check | Description |
+|------|-------|-------------|
+| [ELECTRON001](#1-packagejson-not-allowed) | package.json not allowed | Ensures no package.json exists outside ElectronHostHook |
+| [ELECTRON002](#2-electron-manifestjson-not-allowed) | electron-manifest.json not allowed | Detects deprecated manifest files |
+| [ELECTRON003](#3-electron-builderjson-location) | electron-builder.json location | Verifies electron-builder.json exists in Properties folder |
+| [ELECTRON004](#3-electron-builderjson-location) | electron-builder.json wrong location | Warns if electron-builder.json is found in incorrect locations |
+| [ELECTRON005](#4-parent-paths-not-allowed-in-electron-builderjson) | Parent paths not allowed | Checks for `..` references in config |
+| [ELECTRON006](#5-publish-profile-validation) | ASP.NET publish profile mismatch | Warns when ASP.NET projects have console-style profiles |
+| [ELECTRON007](#5-publish-profile-validation) | Console publish profile mismatch | Warns when console projects have ASP.NET-style profiles |
+
+---
+
+## 1. package.json not allowed
+
+**Warning Code:** `ELECTRON001`
+
+### What is checked
+
+The build system scans for `package.json` and `package-lock.json` files in your project directory. These files should not exist in the project root or subdirectories (with one exception).
+
+### Why this matters
+
+In previous versions of Electron.NET, a `package.json` file was required in the project. The new version generates this file automatically from MSBuild properties defined in your `.csproj` file.
+
+### Exception
+
+A `package.json` file **is allowed** in the `ElectronHostHook` folder if you're using custom host hooks. This is the only valid location for a manually maintained package.json.
+
+### How to fix
+
+1. **Open your project's `.csproj` file**
+2. **Add the required properties** to a PropertyGroup with the label `ElectronNetCommon`:
+
+```xml
+<PropertyGroup Label="ElectronNetCommon">
+  <PackageId>my-electron-app</PackageId>
+  <Title>My Electron App</Title>
+  <Version>1.0.0</Version>
+  <Description>My awesome Electron.NET application</Description>
+  <Company>My Company</Company>
+  <Copyright>Copyright © 2025</Copyright>
+  <ElectronVersion>30.0.9</ElectronVersion>
+</PropertyGroup>
+```
+
+3. **Delete the old `package.json`** file from your project root
+
+> **See also:** [Migration Guide](Migration-Guide.md) for complete migration instructions.
+
+---
+
+## 2. electron-manifest.json not allowed
+
+**Warning Code:** `ELECTRON002`
+
+### What is checked
+
+The build system checks for the presence of `electron.manifest.json` or `electron-manifest.json` files in your project.
+
+### Why this matters
+
+The `electron.manifest.json` file format is deprecated. All configuration should now be specified using:
+- MSBuild properties in your `.csproj` file (for application metadata)
+- The `electron-builder.json` file in the `Properties` folder (for build configuration)
+
+### How to fix
+
+1. **Migrate application properties** to your `.csproj` file (see [Migration Guide](Migration-Guide.md))
+2. **Move the `build` section** from `electron.manifest.json` to `Properties/electron-builder.json`
+3. **Delete the old `electron.manifest.json`** file
+
+**Example electron-builder.json:**
+```json
+{
+    "compression": "maximum",
+    "win": {
+        "icon": "Assets/app.ico",
+        "target": ["nsis", "portable"]
+    },
+    "linux": {
+        "icon": "Assets/app.png",
+        "target": ["AppImage", "deb"]
+    },
+    "mac": {
+        "icon": "Assets/app.icns",
+        "target": ["dmg", "zip"]
+    }
+}
+```
+
+---
+
+## 3. electron-builder.json Location
+
+**Warning Codes:** `ELECTRON003`, `ELECTRON004`
+
+### What is checked
+
+- `ELECTRON003`: Verifies that an `electron-builder.json` file exists in the `Properties` folder
+- `ELECTRON004`: Warns if `electron-builder.json` is found in incorrect locations
+
+### Why this matters
+
+The `electron-builder.json` file must be located in the `Properties` folder so it can be properly copied to the output directory during publishing.
+
+### How to fix
+
+1. **Create the Properties folder** if it doesn't exist
+2. **Move or create** `electron-builder.json` in `Properties/electron-builder.json`
+3. **Remove** any `electron-builder.json` files from other locations
+
+**Expected structure:**
+```
+MyProject/
+├── Properties/
+│   ├── electron-builder.json    ✅ Correct location
+│   ├── launchSettings.json
+│   └── PublishProfiles/
+├── MyProject.csproj
+└── Program.cs
+```
+
+---
+
+## 4. Parent paths not allowed in electron-builder.json
+
+**Warning Code:** `ELECTRON005`
+
+### What is checked
+
+The build system scans the `electron-builder.json` file for parent-path references (`..`).
+
+### Why this matters
+
+During the publish process, the `electron-builder.json` file is copied to the build output directory. Any relative paths in this file are resolved from that location, not from your project directory. Parent-path references (`../`) will not work correctly because they would point outside the published application.
+
+### How to fix
+
+1. **Move resource files** (icons, installers, etc.) inside your project folder structure
+2. **Configure the files** to be copied to the output directory in your `.csproj`:
+
+```xml
+<ItemGroup>
+  <Content Include="Assets\**\*">
+    <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+  </Content>
+</ItemGroup>
+```
+
+3. **Update paths** in `electron-builder.json` to use relative paths without `..`:
+
+**Before (incorrect):**
+```json
+{
+    "win": {
+        "icon": "../SharedAssets/app.ico"
+    }
+}
+```
+
+**After (correct):**
+```json
+{
+    "win": {
+        "icon": "Assets/app.ico"
+    }
+}
+```
+
+---
+
+## 5. Publish Profile Validation
+
+**Warning Codes:** `ELECTRON006`, `ELECTRON007`
+
+### What is checked
+
+The build system examines `.pubxml` files in the `Properties/PublishProfiles` folder and validates that they match the project type:
+
+- **ELECTRON006**: For **ASP.NET projects** (using `Microsoft.NET.Sdk.Web`), checks that publish profiles include `WebPublishMethod`. This property is required for proper ASP.NET publishing.
+
+- **ELECTRON007**: For **console/other projects** (not using the Web SDK), checks that publish profiles do NOT include the `WebPublishMethod`  property. These ASP.NET-specific properties are incorrect for non-web applications.
+
+### Why this matters
+
+Electron.NET supports both ASP.NET and console application project types, each requiring different publish profile configurations:
+
+| Project Type | SDK | Expected Properties |
+|--------------|-----|---------------------|
+| ASP.NET (Razor Pages, MVC, Blazor) | `Microsoft.NET.Sdk.Web` | `WebPublishMethod`, no `PublishProtocol` |
+| Console Application | `Microsoft.NET.Sdk` | `PublishProtocol`, no `WebPublishMethod` |
+
+Using the wrong publish profile type can lead to incomplete or broken builds.
+
+### How to fix
+
+1. **Delete existing publish profiles** from `Properties/PublishProfiles/`
+2. **Create new publish profiles** using the Visual Studio Publishing Wizard:
+   - Right-click on the project in Solution Explorer
+   - Select **Publish...**
+   - Follow the wizard to create a **Folder** publish profile
+
+For correct publish profile examples for both ASP.NET and Console applications, see **[Package Building](../Using/Package-Building.md#step-1-create-publish-profiles)**.
+
+---
+
+## Disabling Migration Checks
+
+If you need to disable specific migration checks (not recommended), you can set the following properties in your `.csproj` file:
+
+```xml
+<PropertyGroup>
+  <!-- Disable all migration checks -->
+  <ElectronSkipMigrationChecks>true</ElectronSkipMigrationChecks>
+</PropertyGroup>
+```
+
+> ⚠️ **Warning:** Disabling migration checks may result in build or runtime errors. Only disable checks if you fully understand the implications.
+
+---
+
+## See Also
+
+- [Migration Guide](Migration-Guide.md) - Complete step-by-step migration instructions
+- [Advanced Migration Topics](Advanced-Migration-Topics.md) - Complex migration scenarios
+- [Configuration](../Using/Configuration.md) - Project configuration options
+- [Package Building](../Using/Package-Building.md) - Building distributable packages
diff --git a/docs/_Sidebar.md b/docs/_Sidebar.md
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--- a/docs/_Sidebar.md
+++ b/docs/_Sidebar.md
@@ -9,6 +9,7 @@
 
 - [What's new?](Core/What's-New.md)
 - [Migration Guide](Core/Migration-Guide.md)
+- [Migration Checks](Core/Migration-Checks.md)
 - [Advanced Migration](Core/Advanced-Migration-Topics.md)
 
 # Getting Started