public class Metadata : DynamicObject
{
    ...
}  

...
.DataSource(dataSource =>
{
    dataSource.Ajax()
      .Model(model =>
      {
          model.Id("Id");
      });
})

dataKey = (IDataKey<TModel>)new ModelDynamicDataKey(fieldName, lambdaExpression);

namespace Kendo.Mvc.UI.Fluent
{
	using System.Reflection;
	using Extensions;

	/// <summary>
	/// Defines the fluent interface for configuring the <see cref="DataSource"/> Model definition.
	/// </summary>
	/// <typeparam name="TModel">Type of the model</typeparam>
	public abstract class DataSourceModelDescriptorFactoryBase<TModel> : IHideObjectMembers
        where TModel : class
    {
        protected readonly ModelDescriptor model;

        public DataSourceModelDescriptorFactoryBase(ModelDescriptor model)
        {
            this.model = model;
        }

        /// <summary>
        /// Specify the member used to identify an unique Model instance.
        /// </summary>
        /// <param name="fieldName">The member name.</param>
        protected void Id(string fieldName)
        {
            IDataKey<TModel> dataKey;
            if (typeof(TModel).IsDynamicObject())
            {
                var lambdaExpression = ExpressionBuilder.Expression<TModel, object>(fieldName);
                dataKey = new ModelDynamicDataKey<TModel>(fieldName, lambdaExpression);
            }
            else
            {
                dataKey = GetDataKeyForField(fieldName);
            }

            dataKey.RouteKey = dataKey.Name;

            model.Id = dataKey;
        }

        protected IDataKey<TModel> GetDataKeyForField(string fieldName)
        {
            var lambdaExpression = ExpressionBuilder.Lambda<TModel>(fieldName);
            var fieldType = typeof(ModelDataKey<,>).MakeGenericType(new[] { typeof(TModel), lambdaExpression.Body.Type });

            var constructor = fieldType.GetConstructor(new[] { lambdaExpression.GetType() });

            return (IDataKey<TModel>)constructor.Invoke(new object[] { lambdaExpression });
        }
    }
}

namespace Kendo.Mvc.UI
{
    using System;
    using System.Linq.Expressions;
    using Microsoft.AspNetCore.Mvc.Rendering;

    internal class ModelDynamicDataKey<TModel> : IDataKey<TModel>
        where TModel : class
    {
        public ModelDynamicDataKey(string memberName, Expression<Func<TModel, object>> expression)
        {
            RouteKey = "id";
            Name = memberName;
            Expression = expression;
            Value = expression.Compile();
        }

        public string Name
        {
            get;
        }

        public string RouteKey
        {
            get;
            set;
        }

        public Func<TModel, object> Value
        {
            get;
        }

        public Expression<Func<TModel, object>> Expression
        {
            get;
        }

        public object GetValue(object dataItem)
        {
            try
            {
                return Value((TModel)dataItem);
            }
            catch (Microsoft.CSharp.RuntimeBinder.RuntimeBinderException)
            {
                return null;
            }
        }

        public string HiddenFieldHtml(IHtmlHelper<TModel> htmlHelper)
        {
            return htmlHelper.Hidden(Name, null, new { id = "" }).ToString();
        }
    }
}

<nav class="navbar navbar-expand-xl navbar-light bg-light">
        <a class="navbar-brand" href="#">
            <div> <img src="~/images/selo.png" class="pull-left imagem" /> </div>
        </a>
        <a class="navbar-brand" href="#">
            <img src="~/images/softlux.png" class="logo_posicao" alt="">
        </a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarText" aria-controls="navbarText" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarText">
            <ul class="navbar-nav mr-auto">
                        <li class="dropdown nav-text">
                            <a href="#" class="nav-link dropdown-toggle" id="navbarDropdownMenu" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" onclick="aoClicar('3,0')">
                                Example Window 1
                            </a>
                        </li>
                        <li class="dropdown nav-text">
                            <a href="#" class="nav-link dropdown-toggle" id="navbarDropdownMenu" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" onclick="aoClicar('6,0')">
                                Example Window 2
                            </a>
                        </li>
                        <li class="dropdown nav-text">
                            <a href="#" class="nav-link dropdown-toggle" id="navbarDropdownMenu" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" onclick="aoClicar('12,0')">
                                Example Window 3
                            </a>
                        </li>
            </ul>
        </div>
</nav>

@(Html.Kendo().Window()
    .Name("FrmGrid")
    .Resizable()
    .Draggable()
    .Content("Loading...")
    .Visible(false)
    .Modal(false)
    )

<script type="text/javascript">
        function aoClicar(idItem) {
            switch (idItem) {
                case "3,0":
                    var janela = $("#FrmGrid").kendoWindow().data("kendoWindow");

                    janela.setOptions({
                        title: "Table of Environments",
                        width: 980,
                        height: 440
                    });

                    janela.refresh({
                        url: 'http://' + window.location.hostname + ':' + window.location.port + '/Ambiente/Index'    // Open a Controller and Action as Frame
                    });

                    janela.center().open();
                    break;
                case "6,0":
                    var janela = $("#FrmGrid").kendoWindow().data("kendoWindow");

                    janela.setOptions({
                        title: "Table of Professions",
                        width: 980,
                        height: 400
                    });

                    janela.refresh({
                        url: 'http://' + window.location.hostname + ':' + window.location.port + '/Profissao/Index'    // Open a Controller and Action as Frame
                    });

                    janela.center().open();
                    break;
                case "12,0":
                    var janela = $("#FrmGrid").kendoWindow().data("kendoWindow");

                    janela.setOptions({
                        title: "Table of reasons",
                        width: 980,
                        height: 560
                    });

                    janela.refresh({
                        url: 'http://' + window.location.hostname + ':' + window.location.port + '/Motivo/Index'    // Open a Controller and Action as Frame
                    });

                    janela.center().open();
                    break;
                default:
                    alertify.error('Window not disponible.');
            }
        }
</script>

janela.setOptions({
    title: "Table of reasons",
    width: 980,
    height: 560
});

var janela = $("#FrmGrid").kendoWindow({
        title: "Table of reasons",
        width: 980,
        height: 560
    }).data("kendoWindow");

Thanks,

Rathish S