关于C#转换二进制所引起的一些思考

var binary = Convert.ToString(7, 2).PadLeft(4, '0').ToArray();

var zerobit = binary[0];
Console.WriteLine(zerobit);

foreach (var b in System.Text.Encoding.UTF8.GetBytes(binary))
{
 Console.WriteLine(b.ToString());
}

var zerobit = binary[0];
Console.WriteLine(zerobit.ToString());

var binary = Convert.ToString(7, 2).PadLeft(4, '0').ToArray();

var binary1 = Convert.ToString(7, 2).PadLeft(4, '0').ToCharArray();

public unsafe char[] ToCharArray()
{
 if (Length == 0)
 {
  return Array.Empty<char>();
 }
 char[] array = new char[Length];
 fixed (char* smem = &_firstChar)
 {
  fixed (char* dmem = &array[0])
  {
   wstrcpy(dmem, smem, Length);
  }
 }
 return array;
}

internal unsafe static void wstrcpy(char* dmem, char* smem, int charCount)
{
 Buffer.Memmove((byte*)dmem, (byte*)smem, (uint)(charCount * 2));
}

public static TSource[] ToArray<TSource>(this IEnumerable<TSource> source)
{
 if (source == null)
 {
  throw Error.ArgumentNull("source");
 }
 return new Buffer<TSource>(source).ToArray();
}

internal Buffer(IEnumerable<TElement> source)
{
 TElement[] array = null;
 int num = 0;
 ICollection<TElement> collection = source as ICollection<TElement>;
 if (collection != null)
 {
  num = collection.Count;
  if (num > 0)
  {
   array = new TElement[num];
   collection.CopyTo(array, 0);
  }
 }
 else
 {
  foreach (TElement item in source)
  {
   if (array == null)
   {
    array = new TElement[4];
   }
   else if (array.Length == num)
   {
    TElement[] array2 = new TElement[checked(num * 2)];
    Array.Copy(array, 0, array2, 0, num);
    array = array2;
   }
   array[num] = item;
   num++;
  }
 }
 items = array;
 count = num;
}

public sealed class CharEnumerator : IEnumerator, ICloneable, IEnumerator<char>, IDisposable
{......}