From 1f69f98dfcc867577debf466e9d7cf36fa850ae3 Mon Sep 17 00:00:00 2001
From: Sam Harwell <Sam.Harwell@microsoft.com>
Date: Sun, 5 Jan 2020 21:05:22 -0800
Subject: [PATCH] Use named argument when passing null

---
 src/Compilers/Core/MSBuildTask/CommandLineBuilderExtension.cs | 2 +-
 src/Compilers/Core/MSBuildTask/ManagedCompiler.cs             | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Compilers/Core/MSBuildTask/CommandLineBuilderExtension.cs b/src/Compilers/Core/MSBuildTask/CommandLineBuilderExtension.cs
index ec8e377b79e..299f3b66e88 100644
--- a/src/Compilers/Core/MSBuildTask/CommandLineBuilderExtension.cs
+++ b/src/Compilers/Core/MSBuildTask/CommandLineBuilderExtension.cs
@@ -146,7 +146,7 @@ internal void AppendSwitchIfNotNull
             string[] attributes
         )
         {
-            AppendSwitchIfNotNull(switchName, parameters, attributes, null /* treatAsFlag */);
+            AppendSwitchIfNotNull(switchName, parameters, attributes, treatAsFlags: null);
         }
 
         /// <summary>
diff --git a/src/Compilers/Core/MSBuildTask/ManagedCompiler.cs b/src/Compilers/Core/MSBuildTask/ManagedCompiler.cs
index 780718a0a30..8333170bbfa 100644
--- a/src/Compilers/Core/MSBuildTask/ManagedCompiler.cs
+++ b/src/Compilers/Core/MSBuildTask/ManagedCompiler.cs
@@ -954,7 +954,7 @@ protected override bool ValidateParameters()
         /// </summary>
         internal static bool ListHasNoDuplicateItems(ITaskItem[] itemList, string parameterName, TaskLoggingHelper log)
         {
-            return ListHasNoDuplicateItems(itemList, parameterName, null, log);
+            return ListHasNoDuplicateItems(itemList, parameterName, disambiguatingMetadataName: null, log);
         }
 
         /// <summary>
-- 
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