About type "double?".
来源：互联网 发布：贵州云谷数据有限公司 编辑：程序博客网 时间：2024/05/19 02:20
When encountering type "double?", we can use ".value" to get the value.
For instance:
If A is of double? type, you may get "cannot convert double? to string" when you use A.ToString(). To solve this problem, change it to A.value.ToString().
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