[Solved] C# Add data to each list element [closed]

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My guess is you’re trying to set the Classproperty of all the students in the list at once. You can do this with the ForEachextension method (include using System.Linq):

class Student
{
    public int Id { get; set; }
    public string Name { get; set; }
    public int? Class { get; set; }
}

public class Test
{
    public static void test()
    {
        List<Student> students = new List<Student>();
        students.Add(new Student { Id = 1, Name = "Name 1" });
        students.Add(new Student { Id = 2, Name = "Name 2" });

        students.ForEach(x => x.Class = 4);
    }
}

solved C# Add data to each list element [closed]