sync

src/System.Text.Json/src/System/Text/Json/Serialization/JsonClassInfo.cs

@@ -332,19 +332,17 @@ public JsonPropertyInfo GetProperty(ReadOnlySpan<byte> propertyName, ref ReadSta
  // No cached item was found. Try the main list which has all of the properties.
 
  string stringPropertyName = JsonHelpers.Utf8GetString(propertyName);
- PropertyCache.TryGetValue(stringPropertyName, out JsonPropertyInfo info);
+ if (!PropertyCache.TryGetValue(stringPropertyName, out JsonPropertyInfo info))
+ {
+ info = JsonPropertyInfo.s_missingProperty;
+ }
 
  // Three code paths to get here:
- // 1) info == null. Property not found.
+ // 1) info == s_missingProperty. Property not found.
  // 2) key == info.PropertyNameKey. Exact match found.
  // 3) key != info.PropertyNameKey. Match found due to case insensitivity.
  Debug.Assert(info == null || key == info.PropertyNameKey || Options.PropertyNameCaseInsensitive);
 
- if (info == null)
- {
- info = JsonPropertyInfo.s_missingProperty;
- }
-
  // Check if we should add this to the cache.
  // Only cache up to a threshold length and then just use the dictionary when an item is not found in the cache.
  int cacheCount;