dynamic object problem with linq-Collection of common programming errors

12 years ago

admin

1 minute

When i run the following code :

var aList = new List{"a", "b", "c"};
dynamic a = aList.Where(item => item.StartsWith("a"));
dynamic b = a.Count();

Microsoft.CSharp.RuntimeBinder.RunTimeBinderException raises.

But when I write a code snippet like this:

public interface IInterface
{
}

public class InterfaceImplementor:IInterface
{
    public int ID = 10;
    public static IInterface Execute()
    {
        return new InterfaceImplementor();
    }
}

public class MyClass
{
    public static void Main()
    {
        dynamic x = InterfaceImplementor.Execute();
        Console.WriteLine(x.ID);
    }
}

it’s work.

Why first code snippet doesn’t work?