{
attributeSumValue= beforEntity.Sum(e => Convert.ToDecimal( e.GetType().GetProperties().Where(o => o.Name == attributeName).Single().GetValue(e, null)));
var attributeBefName = "C" + attributeName.Substring(1, attributeName.Length - 1);
item.GetType().GetProperties().Where(b => b.Name == attributeBefName).Single().SetValue(item, attributeSumValue, null);
//foreach (T_GL_IncomeStatementDataUpload Entity in beforEntity)
//{
// Entity.GetType().GetProperties().Where(o=>o.Name==attributeName).Single().GetValue(Entity,null);
//}
}