Merge pull request Blazor-Diagrams#401 from robertmclaws/patch-1

Update ReflectionUtils.cs

samples/SharedDemo/ReflectionUtils.cs

@@ -30,7 +30,7 @@ private static IEnumerable<PossibleOption> ExtractPossibleOptions(Type type, str
 
             var typeName = FormatPropertyType(property.PropertyType);
             var @default = propertyValue?.ToString();
-            var description = property.GetCustomAttribute<DescriptionAttribute>().Description;
+            var description = property.GetCustomAttribute<DescriptionAttribute>()?.Description;
             yield return new PossibleOption(name, typeName, @default, description);
         }
     }