static void Main(string[] args)
{
#region VB Library Functions
VBClass vbObj = new VBClass();
double vbResult = vbObj.Add(10, 12);
Console.WriteLine("VB Function Add(10, 12)\n" + vbResult);
vbResult = vbObj.Subtract(15, 10);
Console.WriteLine("VB Function Subtract(15, 10)\n" + vbResult);
#endregion
#region CS Library Functions
CSClass csObj = new CSClass();
double csResult = csObj.Multiply(10, 2);
Console.WriteLine("CS Function Multiply(10, 2)\n" + csResult);
csResult = csObj.Divide(10, 5);
Console.WriteLine("CS Function Divide(10, 5)\n" + csResult);
#endregion
Console.Read();
}