Datatable To List<Entity>

 public static DataTable ToDataTable<T>(this IEnumerable<T> varlist)
        {
            DataTable dtReturn = new DataTable();

            // column names  
            PropertyInfo[] oProps = null;

            if (varlist == null) return dtReturn;

            foreach (T rec in varlist)
            {
                // Use reflection to get property names, to create table, Only first time, others will follow  
                if (oProps == null)
                {
                    oProps = ((Type) rec.GetType()).GetProperties();
                    foreach (PropertyInfo pi in oProps)
                    {
                        Type colType = pi.PropertyType;

                        if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof (Nullable<>)))
                        {
                            colType = colType.GetGenericArguments()[0];
                        }

                        dtReturn.Columns.Add(new DataColumn(pi.Name, colType));
                    }
                }

                DataRow dr = dtReturn.NewRow();

                foreach (PropertyInfo pi in oProps)
                {
                    dr[pi.Name] = pi.GetValue(rec, null) == null ? DBNull.Value : pi.GetValue
                                                                                      (rec, null);
                }

                dtReturn.Rows.Add(dr);
            }
            return dtReturn;
        }