Convert from IBM floating point to IEEE floating point standard and Vice Versa- In C#?

Question

Was looking for a way to IEEE floating point numbers to IBM floating point format for a old system we are using.

Is there a general formula we can use in C# to this

Answer 1

Using first answer I added the following that may be useful in some cases:

///

  /// Converts an IEEE floating number to its string representation (4 or 8 ascii codes).
    /// Useful for SAS XPORT files format.
    /// 
    /// IEEE number
    /// When true, output is 8 chars rather than 4
    /// Printable string according to hardware's endianness
    public static string Float2IbmAsAsciiCodes(float from_, bool padTo8_ = true)
    {
        StringBuilder sb = new StringBuilder();
        string s;
        byte[] bytes = BitConverter.GetBytes(Float2Ibm(from_)); // big endian order

        if (BitConverter.IsLittleEndian)
        {
            // Revert bytes order
            for (int i = 3; i > -1; i--)
                sb.Append(Convert.ToChar(bytes[i]));
            s = sb.ToString();
            if (padTo8_)
                s = s.PadRight(8, '\0');
            return s;
        }
        else
        {
            for (int i = 0; i < 8; i++)
                sb.Append(Convert.ToChar(bytes[i]));
            s = sb.ToString();
            if (padTo8_)
                s = s.PadRight(8, '\0');
            return s;
        }
    }