ASP.NET

// The ViewModel
var viewmodel = function (){
    model = ko.mapping.fromJS([]),
    init = function(initialData) {
      model = initialData; 
    },
    save = function(data, event) {
      $.ajax({
         // ....
      });
    },
    delete = function(data, event) {
       $.ajax({
         // ....
      });
    };
    return{
        Init : init,
        Save : save,
        Delete : delete
    };
};

$(document).ready(function () {
   viewmodel.Init(Model.toJSON());
   ko.applyBindings(viewmodel);
});

Model.toJSON

model = ko.mapping.fromJS(initialData);

model = ko.wrap.fromJS(initialData);

Dictionary<string,TextBox> AllTextBoxes = new
Dictionary<string,TextBox> ();

AllTextBoxes.Items.Add("TextBoxName" + i.ToString(), tb);

string aaa = AllTextBoxes["TextBoxName1"].Text;