public static string ImportBulkDataFromXml <T>(CarDealerContext context,
string inputXml,
Predicate <T> predicate,
string rootElement = null) where T : class, new()
{
var tableName = context
.GetType()
.GetProperties()
.FirstOrDefault(x
=> x
.PropertyType
.GenericTypeArguments
.FirstOrDefault(gta => gta.Name == typeof(T).Name) != null)
?.Name;
var serializer = new XmlSerializer(typeof(T[]), new XmlRootAttribute(rootElement ?? tableName));
var entities = (serializer.Deserialize(new StringReader(inputXml)) as T[])
.Where(x => predicate(x))
.ToArray();
var table = context.GetType().GetProperty(tableName).GetValue(context) as DbSet <T>;
table.AddRange(entities);
context.SaveChanges();
return($"Successfully imported {entities.Length}");
}