C#实现文本文件合并

读取n个文本文件，把文件内容合并到一个文本文件中。主要用了FileStream的ReadByte和WriteByte方法。
class FileCombine 
{ 
     public void CombineFile(String[] infileName,String outfileName) 
     {      
            int b; 
            int n=infileName.Length; 
            FileStream[] fileIn=new FileStream[n]; 
            using (FileStream fileOut = new FileStream(outfileName, FileMode.Create)) 
            { 
                for (int i = 0; i < n; i++) 
                { 
                    try 
                    { 
                        fileIn[i] = new FileStream(infileName[i], FileMode.Open); 
                        while ((b = fileIn[i].ReadByte()) != -1) 
                            fileOut.WriteByte((byte)b); 
                    } 
                    catch (System.Exception ex) 
                    { 
                        Console.WriteLine(ex.Message); 
                    } 
                    finally 
                    { 
                        fileIn[i].Close(); 
                    } 
                     
                } 
            } 
     } 
} 

调用方法如下：
 
class TestCombine 
{ 
     public static void Main(String[] args) 
     { 
         FileCombine c=new FileCombine(); 
         String[] file=new String[2]; 
         file[0]="aa.txt"; 
         file[1]="bb.txt"; 
         c.CombineFile(file,"cc.txt"); 
    } 
}