Fix XML documentation generation to appear in IDE tooltips + recommend markdown

Co-authored-by: omegaleo <5655201+omegaleo@users.noreply.github.com>

OmegaLeo.HelperLib.XmlDocGenerator/EXAMPLE.md

@@ -1,5 +1,27 @@
 # Documentation Attribute IDE Tooltip Example
 
+## Recommended: Use Markdown for Code Examples
+
+For the best IDE experience, we **strongly recommend using markdown code fences** in your `codeExample` parameter:
+
+```csharp
+[Documentation(
+    "MyMethod",
+    "Does something cool",
+    new[] { "param: Description" },
+    @"```csharp
+// Use markdown code fences like this!
+MyMethod(""example"");
+```"
+)]
+```
+
+This provides:
+- ✅ Proper syntax highlighting in IDEs
+- ✅ Better formatting in IntelliSense tooltips
+- ✅ Consistent appearance across Visual Studio, Rider, and VS Code
+- ✅ Markdown rendering in documentation generators
+
 ## Before (Without XML Doc Generator)
 
 When using the `DocumentationAttribute` without the XML Doc Generator, IDEs would not show the documentation:

OmegaLeo.HelperLib.XmlDocGenerator/README.md

@@ -22,12 +22,37 @@ If you want to use the XmlDocGenerator standalone:
 dotnet add package OmegaLeo.HelperLib.XmlDocGenerator
 ```
 
+## Usage Best Practices
+
+### ✨ Recommended: Use Markdown in Code Examples
+
+For the best IDE experience, **use markdown code fences** in your `codeExample` parameter:
+
+```csharp
+[Documentation(
+    "MyMethod",
+    "Does something cool",
+    new[] { "param: Description" },
+    @"```csharp
+// Markdown code fence provides syntax highlighting!
+MyMethod(""example"");
+```"
+)]
+public void MyMethod(string param) { }
+```
+
+**Benefits:**
+- ✅ Proper syntax highlighting in Visual Studio, Rider, and VS Code
+- ✅ Better formatting in IntelliSense tooltips
+- ✅ Professional appearance
+- ✅ Works with documentation generators
+
 ## How It Works
 
 1. **MSBuild Integration**: The package includes MSBuild targets that are automatically imported
-2. **Build-Time Generation**: Runs after CoreCompile to analyze your compiled assembly
+2. **Build-Time Generation**: Runs after Build to augment your final XML documentation
 3. **Attribute Reading**: Uses reflection to read DocumentationAttribute instances
-4. **XML Generation**: Creates/augments XML documentation files
+4. **XML Generation**: Creates/augments XML documentation files in your output directory
 5. **IntelliSense Ready**: IDEs automatically pick up the generated XML
 
 ## Features

OmegaLeo.HelperLib.XmlDocGenerator/build/OmegaLeo.HelperLib.XmlDocGenerator.targets

@@ -2,14 +2,15 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <Target Name="GenerateXmlDocFromDocumentationAttribute" 
-          AfterTargets="CoreCompile" 
+          AfterTargets="Build" 
           Condition="'$(GenerateXmlDocFromDocumentationAttribute)' == 'true' And '$(TargetFramework)' != ''">
     
     <PropertyGroup>
       <!-- Path to the XmlDocGenerator tool in the NuGet package -->
       <XmlDocGenToolPath>$(MSBuildThisFileDirectory)..\tools\net8.0\OmegaLeo.HelperLib.XmlDocGenerator.dll</XmlDocGenToolPath>
-      <TargetAssemblyPath>$(IntermediateOutputPath)$(TargetFileName)</TargetAssemblyPath>
+      <!-- Target the final output assembly and XML, not intermediate -->
-      <TargetXmlDocPath>$(IntermediateOutputPath)$(TargetName).xml</TargetXmlDocPath>
+      <TargetAssemblyPath>$(TargetDir)$(TargetFileName)</TargetAssemblyPath>
+      <TargetXmlDocPath>$(TargetDir)$(TargetName).xml</TargetXmlDocPath>
     </PropertyGroup>
 
     <Message Text="[DocumentationAttribute] Generating XML documentation from DocumentationAttribute for $(TargetName)" 

XmlDocGeneratorLocal.props

@@ -12,14 +12,15 @@
   </PropertyGroup>
 
   <Target Name="GenerateXmlDocFromDocumentationAttribute_Local" 
-          AfterTargets="CoreCompile" 
+          AfterTargets="Build" 
           Condition="'$(GenerateXmlDocFromDocumentationAttribute)' == 'true' And '$(TargetFramework)' != ''">
     
     <PropertyGroup>
       <!-- For local development, use the built tool from the sibling project -->
       <XmlDocGenToolPath_Local>$(MSBuildThisFileDirectory)OmegaLeo.HelperLib.XmlDocGenerator/bin/$(Configuration)/net8.0/OmegaLeo.HelperLib.XmlDocGenerator.dll</XmlDocGenToolPath_Local>
-      <TargetAssemblyPath>$(IntermediateOutputPath)$(TargetFileName)</TargetAssemblyPath>
+      <!-- Target the final output assembly and XML, not intermediate -->
-      <TargetXmlDocPath>$(IntermediateOutputPath)$(TargetName).xml</TargetXmlDocPath>
+      <TargetAssemblyPath>$(TargetDir)$(TargetFileName)</TargetAssemblyPath>
+      <TargetXmlDocPath>$(TargetDir)$(TargetName).xml</TargetXmlDocPath>
     </PropertyGroup>
 
     <Message Text="[DocumentationAttribute] Generating XML documentation from DocumentationAttribute for $(TargetName)" 
@@ -30,6 +31,10 @@
              Importance="high" 
              Condition="!Exists('$(XmlDocGenToolPath_Local)')" />
     
+    <Message Text="[DocumentationAttribute] Target assembly not found at: $(TargetAssemblyPath)" 
+             Importance="high" 
+             Condition="!Exists('$(TargetAssemblyPath)')" />
+    
     <!-- Run the XmlDocGenerator tool -->
     <Exec Command="dotnet &quot;$(XmlDocGenToolPath_Local)&quot; &quot;$(TargetAssemblyPath)&quot; &quot;$(TargetXmlDocPath)&quot;"
           Condition="Exists('$(XmlDocGenToolPath_Local)') And Exists('$(TargetAssemblyPath)')"