EPiServer.dll, PropertyDataFactory logs warning incorrectly

Found in

EPiServer.CMS.Core 11.11.3

Fixed in

EPiServer.CMS.Core 11.14.2


May 13, 2019


Mar 02, 2020


CMS Core


Closed, Fixed and tested


The log for creating a block property in PropertyDataFactory is not formatted correctly, it is not using _log.WarnFormat or creating the log message using string.format. The log message should use the ‘blockTypeReference.ModelTypeString’ so that the log message contains the type which failed to load.

Code here:

private PropertyData CreateBlockProperty(BlockTypeReference blockTypeReference)
Type type2;
if (!string.IsNullOrEmpty(blockTypeReference.ModelTypeString))
Type type = TypeResolver.GetType(blockTypeReference.ModelTypeString, throwOnError: false);
if (type == null)
if (_log.IsWarnEnabled)
_log.Warn("Could not load type '{0}', hence creating untyped property PropertyBlock<BlockData> instead");
type = typeof(BlockData);
if (!typeof(BlockData).IsAssignableFrom(type))
throw new TypeMismatchException(string.Format(CultureInfo.InvariantCulture, "The block type {0} does not inherit from the required class {1}", type.FullName, typeof(BlockData).FullName));
type2 = typeof(PropertyBlock<>).MakeGenericType(type);
type2 = typeof(PropertyBlock<BlockData>);
return CreateInstance(type2);