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# 标准查询操作符
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## 投影操作符
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Select
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### SelectMany
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## 限制操作符
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### Where
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## 排序操作符
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### OrderBy
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## 联接操作符
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## 分组操作符
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## 串联操作符
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## 聚合操作符
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## 生成操作符
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## 转换操作符
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## 元素操作符
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## 相等操作符
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## 量词操作符
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## 分割操作符
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Take 返回序列中,从0开始的连续指定项数据子序列;延迟执行。
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TakeWhile
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