Added MemoryStreamDebugVisualizer

MemoryStreamDebugVisualizer/MemoryStreamObjectSource/MemoryStreamObjectSource.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <LangVersion>12</LangVersion>
+  </PropertyGroup>
+  <ItemGroup>
+    <AdditionalFiles Remove="C:\Users\heilm\source\repos\DebugVisualizer\stylecop.json" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.VisualStudio.DebuggerVisualizers" Version="17.6.1032901" />
+  </ItemGroup>
+</Project>

MemoryStreamDebugVisualizer/MemoryStreamObjectSource/MemoryStreamVisualizerObjectSource.cs

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+// <copyright file="MemoryStreamVisualizerObjectSource.cs" company="PlaceholderCompany">
+// Copyright (c) PlaceholderCompany. All rights reserved.
+// </copyright>
+
+namespace MemoryStreamObjectSource;
+
+using Microsoft.VisualStudio.DebuggerVisualizers;
+using System.IO;
+
+/// <summary>
+/// Object source class for the MemoryStreamVisualizer.
+/// </summary>
+public class MemoryStreamVisualizerObjectSource : VisualizerObjectSource
+{
+    /// <summary>
+    /// How many rows will be transfered, at most, responding to a single request.
+    /// </summary>
+    public const int RowsCountPerRequest = 1024;
+
+    /// <summary>
+    /// How many bytes will be transfered for each row.
+    /// </summary>
+    public const int RowLength = 16;
+
+    /// <inheritdoc/>
+    public override void TransferData(object target, Stream incomingData, Stream outgoingData)
+    {
+        if (target is not MemoryStream memoryStream)
+        {
+            return;
+        }
+
+
+        using BinaryReader binaryReader = new(incomingData);
+        var index = binaryReader.ReadInt32(); // The extension will send the offset (Int32) to start reading from
+
+        using BinaryWriter binaryWriter = new(outgoingData);
+        var backupPosition = memoryStream.Position;
+
+        // Will reply with the current MemoryStream.Position (Int64),
+        // followed by MemoryStream.Length (Int64),
+        // followed by up to 16KB of data retrieved from the MemoryStream
+        binaryWriter.Write(backupPosition);
+        binaryWriter.Write(memoryStream.Length);
+        if (index < memoryStream.Length)
+        {
+            try
+            {
+                var data = new byte[RowsCountPerRequest * RowLength];
+                memoryStream.Seek(index, SeekOrigin.Begin);
+                var count = memoryStream.Read(data, 0, data.Length);
+                binaryWriter.Write(data, 0, count);
+            }
+            finally
+            {
+                // Make sure to restore the MemoryStream to its original position
+                memoryStream.Seek(backupPosition, SeekOrigin.Begin);
+            }
+        }
+
+        binaryWriter.Flush();
+
+    }
+}