Test projects are working.

Vector3VisualizerSource/Vector3Model.cs

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+using System.Runtime.Serialization;
+namespace Vector3VisualizerSource;
+
+[DataContract]
+public class Vector3Model
+{
+    [DataMember]
+    public string Vector3 { get; set; } = "Null";
+    [DataMember]
+    public string Quaternion { get; set; } = "Null";
+}
+

Vector3VisualizerSource/Vector3ObjectSource.cs

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+using Microsoft.VisualStudio.DebuggerVisualizers;
+using NamedPipes;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Numerics;
+
+namespace Vector3VisualizerSource;
+
+public class Vector3ObjectSource : VisualizerObjectSource
+{
+    private static NamedPipeClient? PipeClient { get; set; }
+    private static void Send(Vector3Model vector3Model)
+    {
+        PipeClient  ??= new NamedPipeClient("testPipe");
+        PipeClient.SetMessageAsync($"Hello from {nameof(Vector3ObjectSource)}").GetAwaiter().GetResult();
+    }
+    public Vector3ObjectSource()
+    {
+        Debug.WriteLine("new Vector3ObjectSource");
+    }
+    public override void GetData(object target, Stream outgoingData)
+    {
+        Vector3Model vector3Model = new();
+        switch (target)
+        {
+            case Vector3 vector3:
+                vector3Model.Vector3 = vector3.ToString();
+                break;
+            case IEnumerable<Vector3> vector3List:
+                vector3Model.Vector3 = vector3List.Last().ToString();
+                break;
+            case Quaternion quaternion:
+                vector3Model.Quaternion = quaternion.ToString();
+                break;
+        }
+
+        Send(vector3Model);
+        SerializeAsJson(outgoingData, vector3Model);
+    }
+}

Vector3VisualizerSource/Vector3VisualizerSource.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <Nullable>enable</Nullable>
+	 <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.VisualStudio.DebuggerVisualizers" Version="17.6.1032901" />
+    <PackageReference Include="System.Numerics.Vectors" Version="4.6.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\NamedPipes\NamedPipes.csproj" />
+  </ItemGroup>
+
+</Project>