public static void Main()
{
ExtensionClass obj = new ExtensionClass();
obj.Method3(10);
obj.Method2();
Char c = 'f';
Char.ToUpper(c);
int i = 5;
string str = "nOt iN Proper Format";
long ll = i.Factorial();
Console.WriteLine(str.ToProperFirst());
Console.WriteLine(str.ToProper());
Console.WriteLine(ll.ToString() + c.ToString());
Console.ReadLine();
}
public static void Method2(this ExtensionClass E)
{
Console.WriteLine("method 2 of statcalss");
}
public static void Method3(this ExtensionClass E, int t)
{
Console.WriteLine("method 3 " + t);
}
