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📜  c# 合并两个列表并返回 - C# 代码示例

📅  最后修改于: 2022-03-11 14:48:48.238000             🧑  作者: Mango

代码示例3
// Create your object
public class A { int Id { get; set; } A() { } A(int id) { Id = id;} }
public class B { int Id { get; set; } B() { } B(int id) { Id = id;} }

// Construct your lists
List list = new List() { new A( Id = 1 ), new A( Id = 2 ) };
List list1 = new List() { new B( Id = 3 ), new B( Id = 4 ) };

// Then create a linq query and convert the result to a list
List all = (from x in list select (object)x).ToList();

// Now add the second list to the end of the last one
all.AddRange((from x in list1 select (object)x).ToList());

// You can use this new list to loop it like this
foreach (object item in all)
{
    // If you want to check which object we are looping you do this:
    bool obj1 = item is A;
    // Now you can cast the item to your object in a conditional operator
    Console.WriteLine(obj1 ? (item as A).Id : (item as B).Id);

    // Output:
    // 1
    // 2
      // 3
      // 4
}