聚合操作
Aggregate
Performs a custom aggregation operation on the values in the collection.
IList<String> strList =newList<String>(){"One","Two","Three","Four","Five"};
var commaSeperatedString = strList.Aggregate((s1, s2)=> s1 +", "+ s2);
Console.WriteLine(commaSeperatedString);
//Results
One,Two,Three,Four,Five
Average
calculates the average of the numeric items in the collection.
Count
Counts the elements in a collection.
LongCount
Counts the elements in a collection.
Max
Finds the largest value in the collection.
Min
Finds the smallest value in the collection.
Sum
Calculates sum of the values in the collection.
时间: 2024-08-23 23:01:01