[NET10.0] Performance Regression related to XAML Parsing

[PureWeen]

Description

@StephaneDelcroix Ping @PureWeen for more info

GetElementType invokes GetTypeReference, but in .NET 10, it calls the new GetTypeReferences method, which is an iterator. This change results in the enumeration being executed three times - once for each of the following checks:
if (!types.Any())
if (types.Distinct().Skip(1).Any())
var type = types.Distinct().FirstOrDefault()