query.Append("INSERT INTO ");

query.Append(table);

query.Append(" (nick,email,nome,datanasc,ruaenumero,bairro,cidade,cep,país,sexo,feminino,estado,home_page) VALUES (");

query.Append((nick));

query.AppendFormat(", {0}", (email));

query.AppendFormat(", {0}", (nome));

query.AppendFormat(", {0}", (datanasc));

query.AppendFormat(", {0}", (ruaenumero));

query.AppendFormat(", {0}", (bairro));

query.AppendFormat(", {0}", (cidade));

query.AppendFormat(", {0}", (cep));

query.AppendFormat(", {0}", (país));

query.AppendFormat(", {0}", (sexo));

query.AppendFormat(", {0}", (estado));

query.AppendFormat(", {0}", (home_page));

query.Append(")");

com.CommandText = query.ToString();

private void button1_Click(object sender, System.EventArgs e)

string nick = "'" + txt_apelido.Text + "'";

string email = "'" + txt_email.Text + "'";

string nome = "'" + txt_nome.Text + "'";

string datanasc = "'" + textBox4.Text + "'";

string ruaenumero = "'" + textBox7.Text + "'";

string bairro = "'" + txt_ruaenumero.Text + "'";

string cidade = "'" + textBox5.Text + "'";

string cep = "'" + textBox8.Text + "'";

string país = "'" + comboBox1.Text + "'";

string sexo = "'" + radioButton1.Text + "'";

string[] texto = new string[2];

string estado = "'" + comboBox2.Text + "'";

string home_page = "'" + textBox9.Text + "'";

See my problem actual my friends.. Thank you a lot!!! and that post is a great! Thank you !! again