C#

using System.Management;

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ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_OperatingSystem WHERE Primary = TRUE");
ManagementBaseObject inParams;
ManagementBaseObject outParams;
bool temp;

foreach (ManagementObject os in searcher.Get())
{
	temp = os.Scope.Options.EnablePrivileges;
	os.Scope.Options.EnablePrivileges = true;
	inParams = os.GetMethodParameters("Reboot");
	outParams = os.InvokeMethod("Reboot", inParams, null);
	os.Scope.Options.EnablePrivileges = temp;
}

private void btnBold_Click(object sender, System.EventArgs e)
{
	Font oldFont;
	Font newFont;
				
	// Get the font that is being used in the selected text
	oldFont = this.rtfText.SelectionFont;

	// If the font is using bold style at the moment, we should remove it
	if (oldFont.Bold)
	       newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Bold);
	else
        	newFont = new Font(oldFont, oldFont.Style | FontStyle.Bold);

	// Insert the new font
	this.rtfText.SelectionFont = newFont;
	this.rtfText.Focus();
}