ASP.NET MVC checkbox always false

I got the same issue, I fixed it by writing html checkbox tag, giving it the name same as property name, and value = true, if the checkbox is not checked no need to worry as it won't be submitted anyway, in your case this will be it

<input type="checkbox" name="Remember" value="true" />

With Razor, I had the same problem. What worked for me was taking off the value="xxx" tag. Then it functioned normally.

Does not work:

 <input class="form-check-input" value="true" asp-for="Answer.aIsCorrect" />

Works:

 <input class="form-check-input" asp-for="Answer.aIsCorrect" />