This method will create users for a test tenant in order to test paging, or if you're trying to do some sort of testing.

CreateRandomUsers

using Microsoft.IdentityModel.Clients.ActiveDirectory;
using System.Net.Http.Headers;
using System.Net.Http;

        static async Task createRandomUsers()
        {
            httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", result.AccessToken);
            Console.WriteLine("\n \n Creating users {0}", DateTime.Now.ToString());

            for(int index = 0;index < 10; ++index)
            {
                var values = "{\r\n  \"accountEnabled\": true,\r\n  \"displayName\": \"TestName "+ index + "\",\r\n  \"mailNickname\": \"TestNameNickName\",\r\n  \"userPrincipalName\": \"TestNameNickName"+index+"@" + tenantID + "\",\r\n  \"passwordProfile\" : {\r\n    \"forceChangePasswordNextSignIn\": true,\r\n    \"password\": \"MyNewPassword123\"\r\n  }\r\n}";
              
                var content = new StringContent(values, Encoding.Default, "application/json");

                HttpResponseMessage response = await httpClient.PostAsync(resourceUri + "/v1.0/users", content);

                if (response.IsSuccessStatusCode)
                {
                    // Read the response and output it to the console.
                    string users = await response.Content.ReadAsStringAsync();
                    JavaScriptSerializer serializer = new JavaScriptSerializer();
                    Console.WriteLine("\n \n Printing Created User \n \n");
                    Console.WriteLine(JsonPrettify(users));
                    Console.WriteLine("Received Info");
                }
                else
                {
                    Console.WriteLine("Failed to retrieve To Do list\nError:  {0}\n", response.ReasonPhrase);
                }
            }
        }