C# Convert Hexadecimal to Binary String Conversion

There is no need to code tons of codes, loops, to convert hex to binary string. Convert.ToInt32 function is very useful for this purpose.
Let's convert the "A" character to binary format.

private string hex2binary(string hexvalue)
{
  string binaryval = "";
  binaryval = Convert.ToString(Convert.ToInt32(hexvalue, 16), 2);
  return binaryval;
}

When we call hex2binary("A"); it will return "1010" similar samples below;

hex2binary("1a"); will return "11010";
hex2bianry("1a2c"); will return "1101000101100"; and so on.

Keep in mind that this hex to binary conversion style uses 32 bit integer number.