how to copy from text box to struct C#

[ajithsrao]

I need to copy the strings from text box to struct. is there any way to do it? here's what am trying:

    public unsafe struct mystruc
    {
        public fixed byte[] install_name[32]; 
        public byte[] fixed install_id[4];limit 4 bytes
        public fixed byte[] model_name[6]; limit 4 bytes
    };

    private void write_b_Click(object sender, EventArgs e)
    {
        mystruc mstruc1 = new mystruc();

        //copy from textbox to struct    
mstruc.install_name =Encoding.UTF8.GetBytes(installation_name_tb.Text);
 
mstruc.install_id =Encoding.UTF8.GetBytes(installation_id_tb.Text);
        mstruc.model_name = Encoding.UTF8.GetBytes(model_tb.Text);    
    }

and also other way round. its not working.. :( any help greatly appreciated