C#

<br />
foreach(string jr2 in Environment.GetCommandLineArgs()){ <br />
                count++;<br />
                string ComandArgs = jr2.ToLower();<br />
                byte[] jr = new byte[]{1};<br />
                    try{<br />
                        if(count !=1){//skip one count because it only returns the program name.<br />
                            switch(jr2.Replace("-",null)){<br />
                                case "commandarg1":<br />
                                         break;<br />
)//close if<br />
}//close switch<br />
)//close foreach<br />

DESCryptoServiceProvider des = new DESCryptoServiceProvider(); <br />
					byte[] prndKey = new byte[KeySecretString.Length];<br />
					PasswordDeriveBytes db = new PasswordDeriveBytes(KeySecretString,prndKey);<br />
					byte[] f= db.GetBytes(16);

SymmetricAlgorithm sa = new DESCryptoServiceProvider();<br />
PasswordDeriveBytes pdb = new PasswordDeriveBytes(pwd, saltBytes);<br />
sa.Key = pdb.GetBytes(sa.LegalKeySizes[0].MaxSize / 8);

<br />
private void DecryptData(String inName, String outName, string KeySecretString)<br />
			 {  <br />
				    //Create the file streams to handle the input and output files.<br />
				    FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);<br />
				    FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);<br />
				    fout.SetLength(0);<br />
					string FileN = Path.GetFileName(outName);<br />
					InformationFile.Text = FileN;<br />
					InformationFile.Update();<br />
				    //Create variables to help with read and write.<br />
				    byte[] bin = new byte[buffersize]; //This is intermediate storage for the encryption.<br />
				    long rdlen = 0;              //This is the total number of bytes written.<br />
				    long totlen = fin.Length;    //This is the total length of the input file.<br />
				    int len;                     //This is the number of bytes to be written at a time.<br />
DESCryptoServiceProvider tdes = new DESCryptoServiceProvider(); <br />
					tdes.IV = ASCIIEncoding.ASCII.GetBytes(KeySecretString);			<br />
					tdes.Key =ASCIIEncoding.ASCII.GetBytes(KeySecretString);<br />
				    CryptoStream encStream = new CryptoStream(fout, tdes.CreateDecryptor(tdes.Key, tdes.IV), CryptoStreamMode.Write);        <br />
				    Console.WriteLine("Encrypting...");<br />
				    //Read from the input file, then encrypt and write to the output file.<br />
				    while(rdlen < totlen)<br />
				    {<br />
				        len = fin.Read(bin, 0, buffersize);<br />
				        encStream.Write(bin, 0, len);<br />
				        rdlen = rdlen + len;<br />
				        Console.WriteLine("{0} bytes processed", rdlen);<br />
<br />
				    }<br />
				   	fout.Flush();<br />
					fin.Flush();<br />
					encStream.Flush();<br />
				    encStream.Close();<br />
					fout.Close();<br />
					fin.Close();<br />
					return;<br />
				} <br />