c# - 如何从列表列表中删除重复条目

Question

我有如下列表，

List<List<String>> ListsToMerge

假设这个列表还有 3 个内部列表。

ListsToMerge [0] = {"Apple", "Grapes", "Banana"}
ListsToMerge [1] = {"Guava", "Apple", "Strawberry"}
ListsToMerge [2] = {"Strawberry", "Almonds", "Peach"}

我需要从上面的列表中删除重复的条目并创建一个主列表。

List<string> MergedList

这个 MergedList 应该删除重复的条目并且只应该包含

MergedList = {"Apple","Grapes","Banana","Guava","Strawberry","Almonds","Peach"}

Answer 1

试试这个:不用 LINQ

List<string> MergedList = new List<string>();
foreach(List<string> ls in ListsToMerge)
{
    foreach(string s in ls)
    {
       if(!MergedList.Contains(s))
       {
           MergedList.Add(s)
       }
    }
}