汉字编码问题转换

using System;
class DistrictCode
{
	public static void Main(string[] args)
	{
		while(true)
		{
			Console.Write("请输入(输入“E”退出):");
			string inputString =Console.ReadLine();
			if(iSnputString=="e"||inputString=="E")
			{
				break;
			}
			else
			{
				Console.WriteLine(TextTOQwm(inputString));
			}
		}
	}
	public static string TextTOQwm(string character)
	{
		string coding="";
		int i1=0;
		int i2=0;
		int i3=0;
		for(int i=0;i<character.Length;i++)
		{
			byte [] bytes=System.Text.Encoding.Default.GetBytes(character.Substring(i,1));
			i1=(short)(bytes[0]);
			if(bytes.Length!=1)
			{
				i2=(short)(bytes[1]);
				i3=1;
			}
			else
			{
				i2=65536;
				i3=-1;
			}
			int chrasc=i1*256+i2-65536;
			if(chrasc>0 && chrasc<160)
			{
				Console.WriteLine("只能输入汉字");
			}
			else
			{
				if(i3==-1)
				{
					Console.WriteLine("只能输入汉字");
				}
				else
				{
					string lowCode=System.Convert.ToString(Math.Abs
					(Convert.ToInt32(System.Convert.ToString(bytes[0]))-160));
					if(lowCode.Length==1)
					{
						lowCode="0"+lowCode;
					}
					string hightCode=System.Convert.ToString(Math.Abs
					(Convert.ToInt32(System.Convert.ToString(bytes[1]))-160));
					if(hightCode.Length==1)
					{
						hightCode="0"+hightCode;
					}
					coding+=character.Substring(i,1)+(lowCode+hightCode);
				}
			}
		}
		return coding;
	}
}