Encript Decript String In Asp.Net

public string Encrypt(string text) // public static string Encrypt(string text)
{
try
{
text = text.Trim();
byte[] encData_byte = new byte[text.Length];
encData_byte = System.Text.Encoding.UTF8.GetBytes(text);
string encodedData = Convert.ToBase64String(encData_byte);
return encodedData;
}
catch
{
throw;
}
// return string.Empty;
}
public string Decrypt(string text) // public static string Decrypt(string text)
{
try
{
text = text.Trim();
System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
System.Text.Decoder utf8Decode = encoder.GetDecoder();
byte[] todecode_byte = Convert.FromBase64String(text);
int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
char[] decoded_char = new char[charCount];
utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
string result = new String(decoded_char);
return result.Replace("\\","").Replace("\"","");
}
catch
{
throw;
// Handle Exception Here
}
// return string.Empty;
}

Call Encript Decript Finction In Code Behind file:-
string Id = Decrypt(Request["Id"]);
string Id = Encrypt("\"" + Ds.Tables[0].Rows[i]["MaterialID"].ToString() + "\"");