Collection always null when using [FromForm] attribute

For test I used the following arrayOfContent:

var arrayOfContent = [];
arrayOfContent.push({ name: 'test', link: 'test.com' });
arrayOfContent.push({ name: 'test2', link: 'test2.com' });

And I used a for loop to append the array to the form data:

for (var i = 0; i < arrayOfContent.length; i++) {
    formData.append("Contents[" + i + "].Name", arrayOfContent[i].name);
    formData.append("Contents[" + i + "].Link", arrayOfContent[i].link);
}

And I in Visual Studio I can see that it can bind it: