String.Format占位符

string.Format("{0,-50}", theObj);//格式化成50个字符，原字符左对齐，不足则补空格

string.Format("{0,50}", theObj);//格式化成50个字符，原字符右对齐，不足则补空格

Console.WriteLine("{0} with{1,11} priority has a count ={2,13}", Thread.CurrentThread.Name,
Thread.CurrentThread.Priority, counter.ToString("N0"));