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print console characters faster

I have a function that accepts a number which will convert it to a 5x7 graphic representation of digits like this:

Console.WriteLine(" ███ ");  // byte: 0000 1110
Console.WriteLine("█   █");  //       0001 0001
Console.WriteLine("█   █");  //       0001 0001
Console.WriteLine("█   █");  //       0001 0001
Console.WriteLine("█   █");  //       0001 0001
Console.WriteLine("█   █");  //       0001 0001
Console.WriteLine(" ███ ");  //       0000 1110

I was told it can be done faster using byte arrays. This is basically what I did:

byte[] data = new byte[] { 14, 17, 17, 17, 17, 17, 14 };
BitArray bitData = new BitArray(data);


int bitCounter = 0;
foreach (bool bit in bitData)
{ 
  if (bit)   
    Console.Write("█");
  else 
    Console.Write(" ");
  bitCounter++;
  if (bitCounter>7)
  { 
    bitCounter=0;
    Console.WriteLine();
  }
}

This is slower than what is started with so I can't use it. Can anyone show me a better way?

Update: StringBuilder does help, but it will be a bit slower than the original code I had. Its still basically using the write command 7 times in the console is slowing me down. I tried using using just 1 write command using \\n, but I need to indent the next line without erasing inside the indented spaces.

I Minimized IO. Here is a version below that makes console calls only at the end.

        var stringBuilder = new StringBuilder();
        bitCounter = 0;
        foreach (bool bit in bitData)
        {                
            if (bit)
                stringBuilder.Append("█");
            else
                stringBuilder.Append(" ");
            bitCounter++;
            if (bitCounter > 7)
            {
                bitCounter = 0;
                Console.WriteLine(stringBuilder.ToString());
                stringBuilder.Clear();
            }
        }

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