c#linq增加新的一条记录同时删除最后一条代码

Sure! Here's an example code snippet in C# using LINQ to add a new record to a list and delete the last record:

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        List<string> records = new List<string>() { "Record 1", "Record 2", "Record 3" };

        // Adding a new record
        string newRecord = "Record 4";
        records.Add(newRecord);

        // Deleting the last record
        string lastRecord = records.Last();
        records.Remove(lastRecord);

        // Printing the updated records
        foreach (string record in records)
        {
            Console.WriteLine(record);
        }
    }
}

In this example, we start with a `List<string>` called `records` containing three records. We add a new record using the `Add()` method, and then delete the last record using the `Last()` method to retrieve it and the `Remove()` method to remove it. Finally, we print the updated records using a foreach loop.