Hello, like this:
var r = Lua.LuaDoString<List<string>>(
string.Format(@"local name, rank, icon, count, debuffType, duration, expirationTime, unitCaster, canStealOrPurge, shouldConsolidate, spellId, canApplyAura, isBossDebuff, isCastByPlayer = UnitAura('player', 'BUFF_NAME');
return name .. '{0}' .. rank .. '{0}' .. icon;", Lua.ListSeparator));
if (r != null && r.Count == 3)
{
var name = r[0];
var rank = r[1];
var icon = r[2];
}