how add Signer to Transaction Solnet C#

[Mehrdadgame]

Hi
How Are You?
I have tow Transaction in Solnet .
I wanna add Signer first Transaction to second Transaction ?
`
Wallet wallet = new Wallet(MnemonicWords);

        Account fromAccount = wallet.GetAccount(10);
        Account toAccount = wallet.GetAccount(8);

        var blockHash = rpcClient.GetLatestBlockHash();
        Console.WriteLine($"BlockHash >> {blockHash.Result.Value.Blockhash}");

        TransactionBuilder txBuilder = new TransactionBuilder()
            .SetRecentBlockHash(blockHash.Result.Value.Blockhash)
            .SetFeePayer(fromAccount)
            .AddInstruction(SystemProgram.Transfer(fromAccount.PublicKey, toAccount.PublicKey, 10000000))
            .AddInstruction(MemoProgram.NewMemo(fromAccount.PublicKey, "Hello from Sol.Net :)"));

        byte[] msgBytes = txBuilder.CompileMessage();
        byte[] signature = fromAccount.Sign(msgBytes);

        byte[] tx = txBuilder.AddSignature(signature)
            .Serialize();

        /////Part2
        ///
        ///
        var decode = Transaction.Deserialize(tx);
        var base58 = new Base58Encoder();
        var convertToStrig = base58.EncodeData(decode.Signatures[0].Signature);

        Wallet walletUser2 = new(MnemonicWordsUser2);

        Account fromAccountUser2 = walletUser2.GetAccount(10);
        Account toAccountUser2 = walletUser2.GetAccount(8);

        var blockHashUser2 = rpcClient.GetLatestBlockHash();
        Console.WriteLine($"BlockHash >> {blockHashUser2.Result.Value.Blockhash}");

        TransactionBuilder txBuilderUser2 = new TransactionBuilder()
            .SetRecentBlockHash(blockHashUser2.Result.Value.Blockhash)
            .SetFeePayer(fromAccountUser2)
            .AddInstruction(SystemProgram.Transfer(fromAccountUser2.PublicKey, toAccountUser2.PublicKey, 10000000))
            .AddInstruction(MemoProgram.NewMemo(fromAccountUser2.PublicKey, "Hello Mehrdad :)"));

        byte[] msgBytesUser2 = txBuilderUser2.CompileMessage();
        byte[] signatureUser2 = fromAccountUser2.Sign(msgBytesUser2);


        var rr = decode.Sign(fromAccountUser2);
        var msgPopulate = Message.Deserialize(txBuilderUser2.CompileMessage());
        var tXPu = Transaction.Populate(msgPopulate, new List<byte[]>
        {
            signatureUser2,
            decode.Signatures[0].Signature
        });


        var txMsgDes = Transaction.Deserialize(tXPu.Serialize());

        var s1 = txMsgDes.Signatures[0].PublicKey.Verify(msgBytesUser2, txMsgDes.Signatures[0].Signature); // true
        var s2 = txMsgDes.Signatures[1].PublicKey.Verify(msgBytesUser2, txMsgDes.Signatures[1].Signature); // true

        var badKeyOrdering = txMsgDes.VerifySignatures(); // returns false


        Console.WriteLine($"Tx base64: {Convert.ToBase64String(txMsgDes.CompileMessage())}");
        RequestResult<ResponseValue<SimulationLogs>> txSimUser2 = rpcClient.SimulateTransaction(tx);
        string logsUser2 = Examples.PrettyPrintTransactionSimulationLogs(txSimUser2.Result.Value.Logs);
        Console.WriteLine($"Transaction Simulation:\n\tError: {txSimUser2.Result.Value.Error}\n\tLogs: \n" + logsUser2);
        RequestResult<string> SecendtSig = rpcClient.SendTransaction(txMsgDes.CompileMessage());
        Console.WriteLine($"Secend Tx Signature: {SecendtSig.Result}");`

[Woody4618]

Hey, which version of the UnitySDK are you using?

[Mehrdadgame]

Hi
No i used Solnet in Vs console

[Woody4618]

Then maybe its better to ask there. https://github.com/bmresearch/Solnet/issues Are you using the newest version? I think there were some fixes about signature ordering there a few months back.
Looks like you cant sign tx1 with walletUser2 because the signer needs to be first fromAccount. But its a bit hard to know what you are trying to do.

[Mehrdadgame]

Thank you man .