linq unique count property
data.Select(x => x.Id).Distinct().Count();
Here is what the above code is Doing:
1. We’re using the `.Select()` method to select the `Id` property from each item in the `data` list.
2. We’re using the `.Distinct()` method to remove any duplicate `Id` values.
3. We’re using the `.Count()` method to count the number of items in the list.
The `.Select()` method is a LINQ method that allows us to select a property from each item in a list.
The `.Distinct()` method is a LINQ method that allows us to remove duplicate values from a list.
The `.Count()` method is a LINQ method that allows us to count the number of items in a list.
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods.
LINQ extension methods are methods that are added to existing types.
In the above example, we’re adding the `.Select()`, `.Distinct()`, and `.Count()` methods to the `List
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `IEnumerable
The `List
The `IEnumerable
An interface is a contract that defines a set of methods that a type must implement.
The `IEnumerable
The `List
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `.Count()` methods are all LINQ extension methods that are added to the `IEnumerable
The `.Select()`, `.Distinct()`, and `