Add-PSSnapin Microsoft.SharePoint.PowerShell

Get-PSSnapin –Registered

 public static Web CreateSite(ClientContext clientCtx, string title, string url, string description)
        {
            try
            {
                WebCreationInformation webCreateInfo = new WebCreationInformation();
                webCreateInfo.Description = description;
                webCreateInfo.Language = 1033;
                webCreateInfo.Title = title;
                webCreateInfo.Url = url;
                webCreateInfo.UseSamePermissionsAsParentSite = true;
                webCreateInfo.WebTemplate = "STS#1";

                Web oNewWebsite = clientCtx.Web.Webs.Add(webCreateInfo);

                clientCtx.Load(oNewWebsite);

                clientCtx.ExecuteQuery();

                return oNewWebsite;
            }
            catch (ServerUnauthorizedAccessException suaex)
            {
                Console.WriteLine(suaex.Message);
            }
            catch (ServerException sex)
            {
                Console.WriteLine(sex.Message);
            }

            return null;
        }

        public static WebTemplate GetTemplate(ClientContext clientCtx, string title)
        {
            WebTemplateCollection templates = clientCtx.Web.GetAvailableWebTemplates(1033, true);

            IEnumerable<WebTemplate> filteredTemplates = clientCtx.LoadQuery(templates.Where(t => t.Title == title));

            clientCtx.ExecuteQuery();

            if (filteredTemplates != null && filteredTemplates.Count() > 0)
                return filteredTemplates.First();
            else
                return null;
        }

  SPWebService.ContentService.DeveloperDashboardSettings.DisplayLevel = SPDeveloperDashboardLevel.On;
            SPWebService.ContentService.DeveloperDashboardSettings.Update();