int integerValue = 1216; 
ushort uIntegerValue;

if (integerValue >= ushort.MinValue & integerValue <= ushort.MaxValue)
{
   uIntegerValue = (ushort) integerValue;
   Console.WriteLine(uIntegerValue);
} 
else
{
   Console.WriteLine("Unable to convert {0} to a UInt16t.", integerValue);
}

//引入命名空间
using System;

class MainClass
{
    public static void Main(string[] args)
    {
    Console.WriteLine("Max for an UInt16 is: {0}", UInt16.MaxValue);
    Console.WriteLine("Min for an UInt16 is: {0}", UInt16.MinValue);

    }

}