To get the encrypted string by given string
//SHA-256
public static string sha256(string randomString){
var crypt = new System.Security.Cryptography.SHA256Managed();
var hash = new System.Text.StringBuilder();
byte[] crypto = crypt.ComputeHash(Encoding.UTF8.GetBytes(randomString));
foreach (byte theByte in crypto){
hash.Append(theByte.ToString("x2"));
}
return hash.ToString();
}