C# convert List<List<object>> to IList<IList<object>>

C# convert List<List<object>> to IList<IList<object>>

To convert a List<List<object>> to an IList<IList<object>> in C#, you can utilize the Cast and ToList LINQ extension methods. Here's an example:

List<List<object>> listOfLists = GetListOfLists(); // Get the List<List<object>> to convert IList<IList<object>> convertedList = listOfLists.Select(list => list.Cast<object>().ToList()) .ToList();

In this example, GetListOfLists() represents a method that retrieves the List<List<object>> that you want to convert.

The Select method is used to project each inner List<object> in listOfLists to an IList<object> by using list.Cast<object>().ToList(). The Cast<object>() method is used to cast each element of the inner list to object, and ToList() converts the resulting IEnumerable<object> to an IList<object>.

Finally, the outer Select is followed by ToList() to convert the sequence of IList<object> to an IList<IList<object>>.

By using this approach, you can convert a List<List<object>> to an IList<IList<object>> by casting the inner lists and projecting them into a new list.

Examples

  1. "C# convert List<List<object>> to IList<IList<object>> using Select"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = listOfLists.Select(list => list.ToList<object>()).ToList<IList<object>>();
    • Description: Uses the LINQ Select method to convert each inner list to IList<object>.

  2. "C# convert List<List<object>> to IList<IList<object>> with ForEach"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = new List<IList<object>>(); listOfLists.ForEach(list => listOfInterfaces.Add(list.ToList<object>()));
    • Description: Iterates through each inner list using ForEach and adds a converted version to the new list.

  3. "C# convert List<List<object>> to IList<IList<object>> using Cast"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = listOfLists.Cast<IList<object>>().ToList();
    • Description: Utilizes Cast to directly convert the outer list to IList<IList<object>>.

  4. "C# convert List<List<object>> to IList<IList<object>> with SelectMany"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = listOfLists.SelectMany(list => list.Select(item => (object)item).ToList()).ToList<IList<object>>();
    • Description: Uses SelectMany to flatten the inner lists and then converts each item to object before creating a new list of interfaces.

  5. "C# convert List<List<object>> to IList<IList<object>> with explicit conversion"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = listOfLists.ConvertAll(list => (IList<object>)list);
    • Description: Utilizes ConvertAll to explicitly convert each inner list to IList<object>.

  6. "C# convert List<List<object>> to IList<IList<object>> using ToList"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = listOfLists.ConvertAll(list => list.ToList<object>());
    • Description: Converts each inner list to List<object> using ConvertAll before creating the final list of interfaces.

  7. "C# convert List<List<object>> to IList<IList<object>> with Select and AsReadOnly"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = listOfLists.Select(list => list.ToList<object>().AsReadOnly()).ToList();
    • Description: Uses Select to convert each inner list to IList<object> and then applies AsReadOnly to create a read-only wrapper.

  8. "C# convert List<List<object>> to IList<IList<object>> with explicit looping"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = new List<IList<object>>(); foreach (var list in listOfLists) { listOfInterfaces.Add(list.ToList<object>()); }
    • Description: Manually iterates through each inner list and adds the converted version to the new list.

  9. "C# convert List<List<object>> to IList<IList<object>> using Select and Cast"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = listOfLists.Select(list => list.Cast<object>().ToList()).ToList();
    • Description: Applies Select to convert each inner list to List<object> and then uses Cast for type conversion.

  10. "C# convert List<List<object>> to IList<IList<object>> using Enumerable.Select"

    • Code:
      List<List<object>> listOfLists = GetListOfLists(); IList<IList<object>> listOfInterfaces = Enumerable.Select(listOfLists, list => list.ToList<object>()).ToList();
    • Description: Uses Enumerable.Select to convert each inner list to List<object> and then creates a new list of interfaces.

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