我怎么能转换成十进制？为十进制
问题描述：
可能是它是一个简单的问题，但我尝试所有转换方法！它仍然有错误！ 你会帮我吗？
may be it is a simple question but I'm try all of conversion method! and it still has error! would you help me?
十进制？ （可空十进制）以十进制
decimal? (nullable decimal) to decimal
答
有很多的选择......
There's plenty of options...
decimal? x = ...
decimal a = (decimal)x; // works; throws if x was null
decimal b = x ?? 123M; // works; defaults to 123M if x was null
decimal c = x.Value; // works; throws if x was null
decimal d = x.GetValueOrDefault(); // works; defaults to 0M if x was null
decimal e = x.GetValueOrDefault(123M); // works; defaults to 123M if x was null
object o = x; // this is not the ideal usage!
decimal f = (decimal)o; // works; throws if x was null; boxes otherwise