C#：对Int32数据类型直接增加位测试扩展方法

using System;

namespace Splash
{
public static class BitOperation
{
/// <summary>
/// Bit位测试
/// </summary>
/// <param name="n">要测试的整数</param>
/// <param name="bit">要测试的Bit位序号</param>
/// <returns>
///     true：该Bit位为1
///     false：该Bit为0
/// </returns>
public static Boolean BitTest(this Int32 n, Int32 bit)
{
if ((n & (1 << bit)) != 0)
{
return true;
}
else
{
return false;
}
}

/// <summary>
/// Bit位设置
/// </summary>
/// <param name="n">要设置的整数</param>
/// <param name="bit">要设置的Bit位序号</param>
public static Int32 BitSet(this Int32 n, Int32 bit)
{
return n | (1 << bit);
}
}
}

static void BitOperation()
{   // 扩展方法测试
Int32 n = 0;

n = n.BitSet(0);    // 设置Bit0
n = n.BitSet(2);    // 设置Bit2

Console.WriteLine(n);
Console.WriteLine("Bit0 = " + n.BitTest(0));    // 测试Bit0
Console.WriteLine("Bit2 = " + n.BitTest(2));    // 测试Bit2

// BitVector32对比
BitVector32 BV = new BitVector32(n);
Console.WriteLine(BV.Data);
Console.WriteLine("Bit0 = " + BV[1 << 0]);      // 测试Bit0
Console.WriteLine("Bit2 = " + BV[1 << 2]);      // 测试Bit2
}