# Microsoft.Net.Http.Headers

``` diff
 namespace Microsoft.Net.Http.Headers {
     public class ContentRangeHeaderValue {
-        public static bool TryParse(StringSegment input, [NotNullWhenAttribute(true)] out ContentRangeHeaderValue parsedValue);
+        public static bool TryParse(StringSegment input, [NotNullWhenAttribute(true)] out ContentRangeHeaderValue? parsedValue);
     }
     public class EntityTagHeaderValue {
-        public static bool TryParse(StringSegment input, [NotNullWhenAttribute(true)] out EntityTagHeaderValue parsedValue);
+        public static bool TryParse(StringSegment input, [NotNullWhenAttribute(true)] out EntityTagHeaderValue? parsedValue);
     }
     public class RangeHeaderValue {
-        public static bool TryParse(StringSegment input, [NotNullWhenAttribute(true)] out RangeHeaderValue parsedValue);
+        public static bool TryParse(StringSegment input, [NotNullWhenAttribute(true)] out RangeHeaderValue? parsedValue);
     }
     public class StringWithQualityHeaderValue {
-        public static bool TryParse(StringSegment input, [NotNullWhenAttribute(true)] out StringWithQualityHeaderValue parsedValue);
+        public static bool TryParse(StringSegment input, [NotNullWhenAttribute(true)] out StringWithQualityHeaderValue? parsedValue);
     }
 }
```

