Create new Site Colleciton

CreateSiteCollection.cs

public static void CreateSiteCollection(ClientContext adminContext, string url, string template, string title, string description, int storageLevel, string owner, bool wait)
        {
            var tenant = new Tenant(adminContext);

            var properties = new SiteCreationProperties()
              {
                  Url = url,
                  Owner = owner,                   
                  Title = title,
                  Template = template,
                  StorageMaximumLevel = storageLevel,
                  UserCodeMaximumLevel = 0
              };

            //start the SPO operation to create the site
            SpoOperation op = tenant.CreateSite(properties);
            adminContext.Load(tenant);
            adminContext.Load(op, i => i.IsComplete);
            adminContext.ExecuteQuery();

            //check if site creation operation is complete
            if (wait)
            {
                while (!op.IsComplete)
                {
                    Console.WriteLine("Waiting for site at {0}", url);
                    //wait 30seconds and try again
                    System.Threading.Thread.Sleep(30000);
                    op.RefreshLoad();
                    adminContext.ExecuteQuery();
                }
            }
        }