Add XML docs to core packages

src/Microsoft.AspNetCore.NodeServices/Util/StringAsTempFile.cs

@@ -3,19 +3,31 @@ using System.IO;
 
 namespace Microsoft.AspNetCore.NodeServices
 {
-    // Makes it easier to pass script files to Node in a way that's sure to clean up after the process exits
+    /// <summary>
+    /// Makes it easier to pass script files to Node in a way that's sure to clean up after the process exits.
+    /// </summary>
     public sealed class StringAsTempFile : IDisposable
     {
         private bool _disposedValue;
 
+        /// <summary>
+        /// Create a new instance of <see cref="StringAsTempFile"/>.
+        /// </summary>
+        /// <param name="content">The contents of the temporary file to be created.</param>
         public StringAsTempFile(string content)
         {
             FileName = Path.GetTempFileName();
             File.WriteAllText(FileName, content);
         }
 
+        /// <summary>
+        /// Specifies the filename of the temporary file.
+        /// </summary>
         public string FileName { get; }
 
+        /// <summary>
+        /// Disposes the instance and deletes the associated temporary file.
+        /// </summary>
         public void Dispose()
         {
             DisposeImpl(true);
@@ -37,6 +49,9 @@ namespace Microsoft.AspNetCore.NodeServices
             }
         }
 
+        /// <summary>
+        /// Implements the finalization part of the IDisposable pattern by calling Dispose(false).
+        /// </summary>
         ~StringAsTempFile()
         {
             DisposeImpl(false);