Get values from Entitycollection in MSCRM USING C#

((Microsoft.Xrm.Sdk.EntityReference)(dt.Attributes["new_customers"])).Name;
((Microsoft.Xrm.Sdk.OptionSetValue)(dt.Attributes["new_qualifications"])).Value;
dt.Attributes["new_pass"];
((Microsoft.Xrm.Sdk.Money)(dt.Attributes["new_fee"])).Value;
dt.Attributes["new_joindate"];
 foreach (var dt in entities.Entities)
       {
           acc["new_name"] = dt.Attributes["new_name"];
           acc["new_qualifications"] = dt["new_qualifications"];
           acc["new_pass"] = dt["new_pass"];
           acc["new_customers"] = dt["new_customers"];
           acc["new_fee"] = dt["new_fee"];
           acc["new_joindate"] = dt["new_joindate"];
           acc["new_testid"] = dt["new_testid"];
           //service.Create(acc);//new_joindate//new_testid
          // service.Update(acc);
           //customer.Name();
           EntityReference customer = (EntityReference)dt.Attributes["new_customers"];
           string Name = customer.Name.ToString();
           OptionSetValue optionState = dt.Attributes["new_qualifications"] as OptionSetValue;
           int opt = optionState.Value;
           string text =dt.Attributes["new_pass"].ToString();
           string tttt = dt.Attributes["new_fee"].ToString();
           decimal amount = ((Microsoft.Xrm.Sdk.Money)(dt.Attributes["new_fee"])).Value;
           DateTime date=Convert.ToDateTime(dt.Attributes["new_joindate"]);
           bool data=dt.GetAttributeValue<bool>("new_pass");
           DateTime dt1 = dt.GetAttributeValue<DateTime>("new_joindate");
           int dst = Convert.ToInt32(dt.GetAttributeValue<OptionSetValue("new_qualifications").Value);