C#

labelControlVersion.Text = string.Format ( "Version: {0}", Assembly.GetExecutingAssembly ( ).GetName ( ).Version ) ;

//get the version from the assemblyinfo.cs
// Version information for an assembly consists of the following four values:
            //
            //      Major Version
            //      Minor Version 
            //      Build Number
            //      Revision
            //
            Version v = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
           //add to label
 lblVersion.Text = v.ToString();

bool ValidateColor(string s)
{
   if(s.Length != 6)//wrong length
     return false;
   for(int i = 0; i < 6; i++)
   {
     int c = (int)s[i];
     if(!(c > 47 && c < 58) || !(c > 64 && c < 71))
       return false;
   }
   return true;
}

public static bool ValidateColor(string s, out int value) {
    return s!=null && s.Length==6 && int.TryParse(s, out value, NumberStyles.HexNumber);
}