In Windows application Tag Property of radio button (controls) is useful as like value field of controls in web Application

I don't have so much experience in windows application.. at that time i have gone through internet
for Value Filed property of Controls in windows application. but i haven't find any link then i have gone through Property windows of Radio Button (any control).then I used that TAG property
like a value field as we are using in web application.
I used it in one of my desktop application.see this one of the step of XML Operation(XMLNodeIterator)

for eg.
rbButton.Tag = (object)xNodeIterator.Current.GetAttribute("ansId", "");

How to get motherboard serial number, Processor ID, VolumeSerialNumber using C#?

Add using System.Management; namespace in your application

then
//Get motherboard's serial number
ManagementObjectSearcher mbs = new ManagementObjectSearcher("Select * From Win32_BaseBoard");
foreach (ManagementObject mo in mbs.Get())
{
textBox1.Text = mo["SerialNumber"].ToString();
}

//Get Processor's Identity
mbs = new ManagementObjectSearcher("Select * From Win32_processor");
foreach (ManagementObject mo in mbs.Get())
{
textBox2.Text = mo["ProcessorID"].ToString();
}

//Get Network Adapter Configuration
mbs = new ManagementObjectSearcher("Select * From Win32_NetworkAdapterConfiguration");
foreach (ManagementObject mo in mbs.Get())
{
textBox3.Text = mo["MACAddress"].ToString();
break;
}

//Get Network Adapter Configuration
mbs = new ManagementObjectSearcher("Select * From win32_logicaldisk");
foreach (ManagementObject mo in mbs.Get())
{
textBox4.Text = mo["VolumeSerialNumber"].ToString();
}