From cf59b11c68e83eedd355a09e80344136c7194abb Mon Sep 17 00:00:00 2001
From: CyrusNajmabadi <cyrusn@microsoft.com>
Date: Thu, 6 Oct 2016 16:43:54 -0700
Subject: [PATCH] Add comment.

---
 .../SymbolTreeInfoIncrementalAnalyzerProvider.cs             | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Features/Core/Portable/IncrementalCaches/SymbolTreeInfoIncrementalAnalyzerProvider.cs b/src/Features/Core/Portable/IncrementalCaches/SymbolTreeInfoIncrementalAnalyzerProvider.cs
index b5e18c712e3..077cb7e0786 100644
--- a/src/Features/Core/Portable/IncrementalCaches/SymbolTreeInfoIncrementalAnalyzerProvider.cs
+++ b/src/Features/Core/Portable/IncrementalCaches/SymbolTreeInfoIncrementalAnalyzerProvider.cs
@@ -52,6 +52,11 @@ public ProjectInfo(VersionStamp versionStamp, SymbolTreeInfo info)
         private struct MetadataInfo
         {
             public readonly DateTime TimeStamp;
+
+            /// <summary>
+            /// Note: can be <code>null</code> if were unable to create a SymbolTreeInfo
+            /// (for example, if the metadata was bogus and we couldn't read it in).
+            /// </summary>
             public readonly SymbolTreeInfo SymbolTreeInfo;
 
             /// <summary>
-- 
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