在丢失范围之前处置对象（SqlCommand）

Question

如何在返回之前处理“命令”而不影响返回类型？
“可靠性错误CA2000（CA2000: Dispose objects before losing scope）”

        SqlCommand command = new SqlCommand(sqlCmd);
        command.CommandTimeout = 240;
        if (applicationId == int.MinValue)
            command.Parameters.AddWithValue("@ApplicationId", DBNull.Value);
        else
            command.Parameters.AddWithValue("@ApplicationId", applicationId);


        return DB.ExecuteDataset(command);

Answer 1

以Jeopardy的风格：＆＃34;什么是using声明？＆＃34;

using(SqlCommand command = new SqlCommand(sqlCmd))
{
    command.CommandTimeout = 240;
    if (applicationId == int.MinValue)
        command.Parameters.AddWithValue("@ApplicationId", DBNull.Value);
    else
        command.Parameters.AddWithValue("@ApplicationId", applicationId);


    return DB.ExecuteDataset(command);
}