Question

I have a problem with passing an anonymous object as an argument in a method. I want to pass the object like in JavaScript. Example:

function Test(obj) {
    return obj.txt;
}
console.log(Test({ txt: "test"}));

But in C#, it throws many exceptions:

class Test
{
    public static string TestMethod(IEnumerable<dynamic> obj)
    {
        return obj.txt;
    }
}
Console.WriteLine(Test.TestMethod(new { txt = "test" }));

Exceptions:

1. Argument 1: cannot convert from ‘AnonymousType#1’ to
   ‘System.Collections.Generic.IEnumerable’
2. The best overloaded method match for
   ‘ConsoleApplication1.Test.TestMethod(System.Collections.Generic.IEnumerable)’
   has some invalid arguments
3. ‘System.Collections.Generic.IEnumerable’ does not contain a
   definition for ‘txt’ and no extension method ‘txt’ accepting a first
   argument of type ‘System.Collections.Generic.IEnumerable’
   could be found (are you missing a using directive or an assembly
   reference?)

Answer 1

It looks like you want:

class Test
{
    public static string TestMethod(dynamic obj)
    {
        return obj.txt;
    }
}

You’re using it as if it’s a single value, not a sequence. Do you really want a sequence?