在LINQ中，可以使用不同的数据类型进行查询和操作。下面是几种常见的数据类型及其对应的LINQ代码示例：

1. 数组(Array):

int[] numbers = { 1, 2, 3, 4, 5 };

var query = from num in numbers
            where num % 2 == 0
            select num;

foreach (var num in query)
{
    Console.WriteLine(num);
}

2. 列表(List):

List names = new List { "Alice", "Bob", "Charlie", "David" };

var query = from name in names
            where name.Length > 4
            select name;

foreach (var name in query)
{
    Console.WriteLine(name);
}

3. 字典(Dictionary):

Dictionary dictionary = new Dictionary
{
    { 1, "Apple" },
    { 2, "Banana" },
    { 3, "Cherry" }
};

var query = from pair in dictionary
            where pair.Value.StartsWith("A")
            select pair;

foreach (var pair in query)
{
    Console.WriteLine(pair.Key + ": " + pair.Value);
}

4. 集合(Set):

HashSet set1 = new HashSet { 1, 2, 3, 4, 5 };
HashSet set2 = new HashSet { 4, 5, 6, 7, 8 };

var query = set1.Intersect(set2);

foreach (var num in query)
{
    Console.WriteLine(num);
}

5. 数据表(DataTable):

DataTable table = new DataTable();
table.Columns.Add("Name", typeof(string));
table.Columns.Add("Age", typeof(int));

table.Rows.Add("Alice", 25);
table.Rows.Add("Bob", 30);
table.Rows.Add("Charlie", 35);

var query = from row in table.AsEnumerable()
            where row.Field("Age") > 30
            select row.Field("Name");

foreach (var name in query)
{
    Console.WriteLine(name);
}

这些示例展示了如何使用LINQ对不同数据类型进行查询和操作。可以根据实际需求进行相应的调整和扩展。