BulkInsert with SqlBulkCopy

BulkInsert.cs

public static void BulkInsert<T>(string connection, string tableName, IList<T> list, string[] propsToSkip)
{
    using (var bulkCopy = new SqlBulkCopy(connection, SqlBulkCopyOptions.TableLock))
    {
        bulkCopy.BatchSize = list.Count;
        bulkCopy.DestinationTableName = tableName;

        var table = new DataTable();
        var props = TypeDescriptor.GetProperties(typeof(T))
            //Dirty hack to make sure we only have system data types 
            //i.e. filter out the relationships/collections
                                    .Cast<PropertyDescriptor>()
                                    .Where(propertyInfo => propertyInfo.PropertyType.Namespace.Equals("System")
                                                            //skip properties to skip                    
                                                            && !propsToSkip.Contains(propertyInfo.Name)
                                                            //skip properties marked with NotMapped attributes
                                                            && IsMapped(propertyInfo))
                                    .ToArray();
        int propertyCount = 0;
        foreach (var propertyDescriptor in props)
        {
            PropertyInfo propertyInfo = propertyDescriptor.ComponentType.GetProperty(propertyDescriptor.Name);
            //Get underlying table's column name instead of property name
            bulkCopy.ColumnMappings.Add(propertyDescriptor.Name, GetTableColumnName(propertyInfo));
            table.Columns.Add(propertyDescriptor.Name, Nullable.GetUnderlyingType(propertyDescriptor.PropertyType) ?? propertyDescriptor.PropertyType);
            propertyCount++;
        }

        var values = new object[propertyCount];
        foreach (var item in list)
        {
            for (var i = 0; i < values.Length; i++)
            {
                values[i] = props[i].GetValue(item);
            }

            table.Rows.Add(values);
        }
        bulkCopy.BatchSize = 5000;
        bulkCopy.BulkCopyTimeout = 12000;
        bulkCopy.WriteToServer(table);
    }
}

        
public static bool IsMapped(PropertyDescriptor propertyDescriptor)
{
    var property = propertyDescriptor.ComponentType.GetProperty(propertyDescriptor.Name);
    var type = typeof(NotMappedAttribute);
    var prop = property.GetCustomAttributes(type, false);
    return prop.Count() == 0;
}

public static string GetTableColumnName(PropertyInfo property)
{
    var type = typeof(ColumnAttribute);
    var prop = property.GetCustomAttributes(type, false);

    if (prop.Count() > 0)
        return ((ColumnAttribute)prop.First()).Name;
    return property.Name;
}