もちろん！ここでは、C#のLINQを使用して、オブジェクトのコレクションのプロパティの1つに基づいてソートし、一意の結果のみを返す方法の例を示します：

Name、Age、City のプロパティを持つ Person オブジェクトのコレクションがあるとします。Ageプロパティに基づいてコレクションをソートし、ユニークなCity値のみを返したい。その方法を以下に示します：

```c#
using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        // Create a list of Person objects
        List<Person> people = new List<Person>()
        {
            new Person { Name = "Alice", Age = 28, City = "New York" },
            new Person { Name = "Bob", Age = 32, City = "Boston" },
            new Person { Name = "Charlie", Age = 28, City = "Los Angeles" },
            new Person { Name = "Dave", Age = 35, City = "Seattle" },
            new Person { Name = "Eve", Age = 32, City = "Chicago" },
        };

        // Sort the list by Age and return only unique City values
        var uniqueCities = people.OrderBy(p => p.Age)
                                 .Select(p => p.City)
                                 .Distinct();

        // Print the unique cities
        foreach (var city in uniqueCities)
        {
            Console.WriteLine(city);
        }
    }
}

// Define the Person class
class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
    public string City { get; set; }
}
```

この例では、まずPersonオブジェクトのリストをサンプルデータと共に作成します。次に LINQ を使用して、リストを Age プロパティで昇順にソートし、各 Person オブジェクトの City プロパティのみを選択します。次に、Distinct() メソッドを使用して、一意の City 値のみを返します。

最後に、foreach ループを使用して、一意の City をコンソールに出力します。

これで、C#のLINQを使用して、オブジェクトのコレクションをプロパティの1つに基づいてソートし、一意の結果のみを返す方法の基本的なアイデアが得られるはずです。
Sure! Here's an example of how to sort a collection of objects based on one of their properties, and returning only unique results using LINQ in C#:

Suppose we have a collection of Person objects with the properties Name, Age, and City. We want to sort the collection based on the Age property and return only unique City values. Here's how we can do it:

```c#
using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        // Create a list of Person objects
        List<Person> people = new List<Person>()
        {
            new Person { Name = "Alice", Age = 28, City = "New York" },
            new Person { Name = "Bob", Age = 32, City = "Boston" },
            new Person { Name = "Charlie", Age = 28, City = "Los Angeles" },
            new Person { Name = "Dave", Age = 35, City = "Seattle" },
            new Person { Name = "Eve", Age = 32, City = "Chicago" },
        };

        // Sort the list by Age and return only unique City values
        var uniqueCities = people.OrderBy(p => p.Age)
                                 .Select(p => p.City)
                                 .Distinct();

        // Print the unique cities
        foreach (var city in uniqueCities)
        {
            Console.WriteLine(city);
        }
    }
}

// Define the Person class
class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
    public string City { get; set; }
}
```

In this example, we first create a list of Person objects with some sample data. We then use LINQ to sort the list by the Age property in ascending order, and select only the City property for each Person object. We then use the Distinct() method to return only the unique City values.

Finally, we print the unique cities to the console using a foreach loop.

This should give you a basic idea of how to sort a collection of objects based on one of their properties and return only unique results using LINQ in C#.