public static string GetPemFileHeader(string fileName)
{
try
{
FileStream fileStream = new FileStream(fileName, FileMode.Open);
byte[] numArray = new byte[fileStream.Length];
fileStream.Read(numArray, 0, numArray.Length);
fileStream.Close();
return(Asn1Util.GetPemHeader(Asn1Util.BytesToString(numArray)));
}
catch
{
return("");
}
}