How do I use post service to send angular ng-model information to my model in ASP.NET?

I am new to software development and to angularjs, and am currently working through a simple project. I have a drop down box in my html that stores the user's selection in an angular model and I need to pass that string to my ASP.NET MVC model that is currently storing two properties that need to be defined. Here is my html:

     <div data-ng-controller="EnvironmentController">
        Environment:
        <select data-ng-model="selectEnvironment">
               <option data-ng-repeat="environment in environments" 
                       value="{{environment}}">{{environment}}</option>
        </select>
        {{selectEnvironment}}
    </div>

Then in my angular javascript file, I need to create a function that can send 'selectEnvironment' as a string back to my asp.net model below:

public class SelectionModels
{
    public string selectVersion { get; set; }
    public string selectEnv { get; set; }
}

Hope that is clear enough. Please let me know if there are any further questions or if I missed any details. THANK YOU!