From c9c661adff60fa7efbed2dd636ddee590698eca7 Mon Sep 17 00:00:00 2001
From: tmat <tomas.matousek@microsoft.com>
Date: Fri, 18 Nov 2022 10:41:45 -0800
Subject: [PATCH] Avoid potential NRE

---
 src/BuiltInTools/dotnet-watch/HotReloadDotNetWatcher.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/BuiltInTools/dotnet-watch/HotReloadDotNetWatcher.cs b/src/BuiltInTools/dotnet-watch/HotReloadDotNetWatcher.cs
index 99f1122c9908..1f21e44a87f0 100644
--- a/src/BuiltInTools/dotnet-watch/HotReloadDotNetWatcher.cs
+++ b/src/BuiltInTools/dotnet-watch/HotReloadDotNetWatcher.cs
@@ -307,8 +307,8 @@ private static void ConfigureExecutable(DotNetWatchContext context, ProcessSpec
             }
 
             var rootVariableName = EnvironmentVariableNames.TryGetDotNetRootVariableName(
-                project.RuntimeIdentifier,
-                project.DefaultAppHostRuntimeIdentifier,
+                project.RuntimeIdentifier ?? "",
+                project.DefaultAppHostRuntimeIdentifier ?? "",
                 project.TargetFrameworkVersion);
 
             if (rootVariableName != null && string.IsNullOrEmpty(Environment.GetEnvironmentVariable(rootVariableName)))