C# to foxpro

One of my clients have got a application that I think is developed in C# and has asked if I can create a tool that will encrypt a file and has the code that currently encrypts it in C#, I am not the best C# developer and not sure how to convert it to VFP 9.

Any help or guidance would be great.

Thanks!

private string encrypt(string sSource)
    {
        int nLength = sSource.Length;

        byte[] dataByte = StrToByteArray(sSource);

        System.Text.StringBuilder encryptData = new System.Text.StringBuilder();

        for (int i = 0; i < dataByte.Length; i++)
        {
            int asciiValue = (int)dataByte[i];
            if (asciiValue < 0)
            {
                asciiValue = asciiValue + 256;
            }
            asciiValue++;
            if (asciiValue == 256)
            {
                asciiValue = 0;
            }

            switch (asciiValue.ToString().Length)
            {
                case 0:
                    break;
                case 1:
                    encryptData.Append("00" + asciiValue.ToString());
                    break;
                case 2:
                    encryptData.Append("0" + asciiValue.ToString());
                    break;
                case 3:
                    encryptData.Append(asciiValue.ToString());
                    break;

            }
        }
        return encryptData.ToString();
    }

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