C# – Cannot implicitly convert type ‘System.Collections.Generic.List

I have this application where I am trying to pass a list to another class. I keep getting the error

Cannot implicitly convert type 'System.Collections.Generic.List<eko_app.LoginForm.Business>' to 'System.Collections.Generic.List<eko_app.GlobalClass.Business>'

The list is generated from Json.

Login class

   private void Connect()
        {
            try
            {
                serverUrl = "https://eko-app.com/Users/login/username:" + usernameEntered + "/password:" + passwordEntered + ".json";

                var w = new WebClient();
                var jsonData = string.Empty;

                // make the login api call
                jsonData = w.DownloadString(serverUrl);

                if (!string.IsNullOrEmpty(jsonData))
                {
                    // deserialize the json to c# .net
                    var response = Newtonsoft.Json.JsonConvert.DeserializeObject<RootObject>(jsonData);

                    // Get the sessionId
                    GlobalClass.SessionId = string.Empty;
                    GlobalClass.SessionId = response.response.SessionId;

                    if (GlobalClass.SessionId != null)
                    {                      
                        var businesses = response.response.Businesses;

                        GlobalClass.Username = "";
                        GlobalClass.Username = usernameEntered;                        

                        GlobalClass.Businesses = null;
                        GlobalClass.Businesses = businesses; **<-----error thrown here**

                        HomeForm homeForm = new HomeForm();
                        this.Hide();
                        homeForm.Show();
                    }
                    else
                    {
                        Console.WriteLine("Login failed");
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private class Business
        {
            public string businessID { get; set; }
            public string businessName { get; set; }
        }

        private class Response
        {
            [JsonProperty("sessionId")]
            public string SessionId { get; set; }

            [JsonProperty("businesses")]    
            public List<Business> Businesses { get; set; }
        }

        private class Messages
        {
            public string sessionId { get; set; }
            public List<Business> businesses { get; set; }
        }

        private class RootObject
        {
            public Response response { get; set; }
            public Messages messages { get; set; }
        }

I have another class: Global Class

namespace eko_app
{
    static class GlobalClass
    {
       ...some code     

        public class Business
        {
            private string businessID { get; set; }
            private string businessName { get; set; }
        }

        private static List<Business> businesses = null;

        public static List<Business> Businesses
        {
            get { return businesses; }
            set { businesses = value; }
        }
    }
}

What am I doing wrong? The error is thrown in the first class at GlobalClass.Businesses = businesses;