Support net8

Restrict scope to reduce what is visible to consumers.

Author: A9G-Data-Droid

mermaid-graph/Diagrams/Base/MermaidDiagram.cs

@@ -49,7 +49,7 @@ protected MermaidDiagram()
     /// <summary>
     /// Initialize the graph output.
     /// </summary>
-    public virtual void Header(string title)
+    internal virtual void Header(string title)
     {
         Graph.Clear();
         Graph.AppendLine($"""
@@ -67,7 +67,7 @@ public virtual void Header(string title)
     /// Get the mermaid diagram Markdown text.
     /// </summary>
     /// <returns>The contents of the graph buffer.</returns>
-    public override string ToString() => Graph.ToString();
+    public sealed override string ToString() => Graph.ToString();
 
     /// <inheritdoc />
     public virtual string Project(FileInfo file, string? filter = null, bool excludeNuget = false)

mermaid-graph/Diagrams/ClassDiagram.cs

@@ -10,7 +10,7 @@ namespace MermaidGraph.Diagrams;
 public sealed class ClassDiagram : MermaidDiagram
 {
     /// <inheritdoc />
-    public override void Header(string title)
+    internal override void Header(string title)
     {
         base.Header(title);
         Graph.AppendLine("classDiagram");

mermaid-graph/Diagrams/GraphDiagram.cs

@@ -10,7 +10,7 @@ namespace MermaidGraph.Diagrams;
 public sealed class GraphDiagram : MermaidDiagram
 {
     /// <inheritdoc />
-    public override void Header(string title)
+    internal override void Header(string title)
     {
         base.Header(title);
         Graph.AppendLine("graph TD");

mermaid-graph/mermaid-graph.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <RootNamespace>MermaidGraph</RootNamespace>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
@@ -63,7 +63,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Build" Version="17.13.9" ExcludeAssets="runtime" />
+    <PackageReference Include="Microsoft.Build" Version="17.11.4" ExcludeAssets="runtime" />
     <PackageReference Include="Microsoft.Build.Locator" Version="1.9.1" />
     <PackageReference Include="System.CommandLine.DragonFruit" Version="0.4.0-alpha.22272.1" />
   </ItemGroup>

mermaid-graphTests/CommandsTests.cs

@@ -56,6 +56,7 @@ public void DogFoodSolutionTest(DiagramType type, string typeName)
 
         Console.WriteLine(graph);
         Assert.That(graph, Is.Not.Null.Or.Empty, "Graph should not be null or empty.");
+        Assert.That(graph, Does.Contain($"title: {info.Name}"));
         Assert.That(graph, Does.Contain("mermaid-graph"));
         Assert.That(graph, Does.Contain("MermaidGraphTests"));
         var graphType = DetectType(ExtractMermaid(graph));
@@ -74,6 +75,7 @@ public void DogFoodProjectTest(DiagramType type, string typeName)
         Assert.That(info.Exists);
         var graph = Commands.Project(info, type);
         Assert.That(graph, Is.Not.Null.Or.Empty, "Graph should not be null or empty.");
+        Assert.That(graph, Does.Contain($"title: {info.Name}"));
         Assert.That(graph, Does.Contain("mermaid-graph"));
         Assert.That(graph, Does.Contain("MermaidGraphTests"));
         Console.WriteLine(graph);

mermaid-graphTests/MermaidDiagramTests.cs

@@ -28,22 +28,4 @@ public void GetDiagramType_ShouldThrowForUnsupportedType()
         Assert.Throws<NotImplementedException>(()=>
             MermaidDiagram.GetDiagramType((DiagramType)999));
     }
-
-    [Test]
-    [TestCase(DiagramType.Class)]
-    [TestCase(DiagramType.Graph)]
-    public void Header_ShouldInitializeGraphWithTitle(DiagramType type)
-    {
-        var diagram = (MermaidDiagram)MermaidDiagram.GetDiagramType(type);
-        
-        // Arrange
-        const string title = "Test Diagram";
-
-        // Act
-        diagram.Header(title);
-
-        // Assert
-        Assert.That(diagram.ToString(), Does.Contain($"title: {title}"));
-    }
 }
-