DB name = NikAfzarDB
TB name = ClientTB 

string connectionString = "Data Source=.;Initial Catalog=NikAfzarDB,Integrated Security=true";

SqlConnection Connection = new SqlConnection(connectionString);

try
{
    string query = "INSERT INTO ClientTB (CID, CFileNumber, CName, CFamily, CPhoneNumber, CJobeName, CCharacter) VALUES (@ID, @FileNumber, @Name, @Family, @PhoneNumber, @JobeName, @Character)";

    SqlCommand Command = new SqlCommand(query, Connection);

    Command.Parameters.AddWithValue("@ID", id);
    Command.Parameters.AddWithValue("@FileNumber", fileNumber);
    Command.Parameters.AddWithValue("@Name", name);
    Command.Parameters.AddWithValue("@Family", family);
    Command.Parameters.AddWithValue("@PhoneNumber", phoneNumber);
    Command.Parameters.AddWithValue("@JobeName", jobName);
    Command.Parameters.AddWithValue("@Character", character);

    Connection.Open();
    Command.ExecuteNonQuery();

    return true;
}
catch
{
    return false;
}
finally
{
    Connection.Close();
}