Error during reassembling a simple HelloWorld program (C#)

[zozidalom]

Hi All,
I have created a simple HelloWorld program in C# .NET Framework v2.0.

I created another one that should disassemble, and reassemble the previously mentioned Hello World program. Disassembling seems to work totally fine, I can print the assembly instructions to the console, but when I try to reassemble it, I get the following error:

System.InvalidOperationException: Can't encode an invalid instruction : 0x7FFAC46ACDB0 (bad)

My code looks like this (I used the examples as baseline):

// Read assembly code
                    const ulong inputRip = 0x00007FFAC46ACDA4;
                    var codeBytes = File.ReadAllBytes(o.InputFile);
                    var codeReader = new ByteArrayCodeReader(codeBytes);
                    var decoder = Decoder.Create(o.CodeBitness, codeReader);
                    decoder.IP = inputRip;
                    var endRip = decoder.IP + (uint)codeBytes.Length;

                    var inputInstructions = new LinkedList<Instruction>();
                    while (decoder.IP < endRip)
                        inputInstructions.AddLast(decoder.Decode());
                    
                    // Todo Process assembly code
                    var outputInstructions = new LinkedList<Instruction>();
                    foreach (var instruction in inputInstructions)
                    {
                        outputInstructions.AddLast(instruction);

                    }

                    // Create new assembly
                    var assembler = new Assembler(o.CodeBitness);
                    foreach (var instruction in outputInstructions)
                    {
                        Console.WriteLine(instruction);
                        assembler.AddInstruction(instruction);
                    }

                    const ulong outputRip = 0x1234_5678_1000_0000;
                    assembler.Assemble(new StreamCodeWriter(new FileStream(o.OutputFile ?? o.InputFile, FileMode.Create)), outputRip);

Any ideas, about what might cause this or how to debug the issue? (I am not really familiar with assembly programming)

[wtfsck]

You decoded an invalid instruction and since it's not an instruction, it can't be re-encoded. Don't decode data, eg. follow branches to find the real code and only encode that code. Google basic blocks.