public static Guid?GetGuidMetadata(this AttributeArgumentSyntax syntax, SemanticModel semanticModel)
{
Guid guid;
if (Guid.TryParse(syntax.GetGuidMetadataValue(), out guid))
{
return(guid);
}
if (Guid.TryParse(syntax.GetGuidMetadataConstantValue(semanticModel), out guid))
{
return(guid);
}
return(null);
}