How to get fields & assigned domains of FeatureClass + ESRI + C#

here is the code to get fields of a featureclass and check for the assigned domain 

IFields fields = featureClass.Fields;
string domainName = string.Empty;
for (int i = 0; i < fields.FieldCount; i++)
{
if (fields.get_Field(i).DomainFixed)
domainName = fields.get_Field(i).Domain.Name;
}

Thanks
Mukund