C# 我有一份国家名单。I'；I’我想按字母顺序排序，除了我所说的两个国家之外'；我想放在第一位

我有一份国家名单。我想按字母顺序排序，除了我想放在前面的两个国家。有没有一种简单的修改方法

from country in Countries
orderby country.Name
select country

要完成此任务，请尝试以下操作：

var specialCountries = new[] { "America", "England" };

from country in Countries
orderby specialCountries.Contains(country.Name) descending, country.Name
select country

from country in countries
orderby (country.Name = "USA" ? 0 : 1), country.Name
select country

如果这不是LINQ到对象，您可能需要以稍微不同的方式编写它才能工作，例如，这可能会工作

from country in Countries
orderby (country.Name == "America" || country.Name == "England") descending, country.Name
select country

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您可以使用以下技巧：

var ordered = Countries.OrderByDescending(c => ConditionHere)
                       .ThenBy(c => c.Name);

例如：

var priorCountries = new[]{ "Italy", "France" };
var ordered = Countries.OrderByDescending(c => priorCountries.Contains(c.Name))
                       .ThenBy(c => c.Name);

试试这个：

var specialCountries = new[] { "America", "England" };

from country in Countries
orderby specialCountries.Contains(country.Name) descending, country.Name
select country

from country in countries
orderby (country.Name = "USA" ? 0 : 1), country.Name
select country

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当然，您需要更改标准，但关键是您可以在orderby子句中执行一些评估。

您的原始列表，其中包含每个国家/地区

var originalList = new List<string> { "B", "A", "E", "D", "C", "F" };

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为什么不把它排序，然后把这两个移到第一位呢？这是一个选择，但不是很优雅