private bool IsWideningPromotion(IType targeType, IType sourceType)
{
var externalTargetType = targeType as ExternalType;
if (null == externalTargetType)
{
return(false);
}
var externalSourceType = sourceType as ExternalType;
if (null == externalSourceType)
{
return(false);
}
return(NumericTypes.IsWideningPromotion(externalTargetType.ActualType, externalSourceType.ActualType));
}
