protected void saveButton_Click(object sender, EventArgs e)
{
string mobileName = inputModelName.Value;
string mobileIMEI = inputIMEI.Value;
int mobilePrice = Convert.ToInt32(inputPrice.Value);
Mobile mobile = new Mobile(mobileName, mobileIMEI, mobilePrice);
saveLabel.Text = manager.GetSaveAllMobie(mobile);
saveLabel.ForeColor = Color.Green;
CLearAllFields();
}