Update StaticFilterOptionsMonitor.cs (#80959)

Fixes https://github.com/dotnet/runtime/issues/80902

diff --git a/src/libraries/Microsoft.Extensions.Logging/src/StaticFilterOptionsMonitor.cs b/src/libraries/Microsoft.Extensions.Logging/src/StaticFilterOptionsMonitor.cs
index 57f17d5..312bb60 100644 (file)
--- a/src/libraries/Microsoft.Extensions.Logging/src/StaticFilterOptionsMonitor.cs
+++ b/src/libraries/Microsoft.Extensions.Logging/src/StaticFilterOptionsMonitor.cs
@@ -10,7 +10,7 @@ namespace Microsoft.Extensions.Logging
     {
         public StaticFilterOptionsMonitor(LoggerFilterOptions currentValue)
         {
-            CurrentValue = currentValue;
+            CurrentValue = currentValue ?? throw new ArgumentNullException(nameof(currentValue));
         }
 
         public IDisposable? OnChange(Action<LoggerFilterOptions, string> listener) => null;