Use ValueStringBuilder in HttpLogging Middleware

Author: Kahbazi

src/Middleware/HttpLogging/src/HttpRequestLog.cs

@@ -37,8 +37,7 @@ public override string ToString()
         {
             if (_cachedToString == null)
             {
-                // TODO use string.Create instead of a StringBuilder here.
-                var builder = new StringBuilder();
+                var builder = new ValueStringBuilder();
                 var count = _keyValues.Count;
                 builder.Append("Request:");
                 builder.Append(Environment.NewLine);

src/Middleware/HttpLogging/src/HttpResponseLog.cs

@@ -37,7 +37,7 @@ public override string ToString()
         {
             if (_cachedToString == null)
             {
-                var builder = new StringBuilder();
+                var builder = new ValueStringBuilder();
                 var count = _keyValues.Count;
                 builder.Append("Response:");
                 builder.Append(Environment.NewLine);

src/Middleware/HttpLogging/src/Microsoft.AspNetCore.HttpLogging.csproj

@@ -6,6 +6,7 @@
     </Description>
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
     <IsAspNetCoreApp>true</IsAspNetCoreApp>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <IsPackable>false</IsPackable>
     <Nullable>enable</Nullable>
@@ -17,6 +18,6 @@
 
     <Compile Include="$(RepoRoot)src\Shared\TaskToApm.cs" Link="Internal\TaskToApm.cs" />
     <Compile Include="$(SharedSourceRoot)Buffers\**\*.cs" LinkBase="Internal\" />
+    <Compile Include="$(SharedSourceRoot)ValueStringBuilder\**\*.cs" />
   </ItemGroup>
-
 </Project>