long longValue = -130;
sbyte byteValue; 

if (longValue <= sbyte.MaxValue && 
    longValue >= sbyte.MinValue)
{    
   byteValue = (sbyte) longValue;
   Console.WriteLine("Converted long integer value to {0}.", byteValue);
}   
else
{
   sbyte rangeLimit;
   string relationship;
   
   if (longValue > sbyte.MaxValue)
   {
      rangeLimit = sbyte.MaxValue;
      relationship = "greater";
   }   
   else
   {
      rangeLimit = sbyte.MinValue;
      relationship = "less";
   }       

   Console.WriteLine("Conversion failure: {0:n0} is {1} than {2}.",  
                     longValue, 
                     relationship, 
                     rangeLimit);
}

//引入命名空间
using System;
using System.Data;


class Class1{
        static void Main(string[] args){
      uint x = 0x01001001;
      uint XComp = ~x;
      Console.WriteLine("~x = " + ~x);

      sbyte B1 = sbyte.MinValue;  
      sbyte B2 = sbyte.MaxValue;
      Console.WriteLine("B1|B2 = " + (((byte)B1|(byte)B2)));

      ushort x2 = 0x00000001;           // Problem
      Console.WriteLine("~x2 = " + ~x2);

      byte y = 1;                       // Problem
      //byte B = ~y;
      Console.WriteLine("~y = " + ~y);

      char x3 = (char)1;               // Problem
      Console.WriteLine("~x3 = " + ~x3);

      sbyte x5 = 1;
      Console.WriteLine("~x5 = " + ~x5);
      
      uint IntResult = (uint)~x;
      Console.WriteLine("IntResult = " + IntResult);
      
      byte ByteResult = (byte)~y;
      Console.WriteLine("ByteResult = " + ByteResult);
        }

}