Hi All, In this article, we will learn about setting Theme to a SharePoint site in Office 365 using CSOM. Below is the sample CSOM code to achieve the same. ClientContext clientContext= new ClientContext(siteUrl); clientContext.AuthenticationMode = ClientAuthenticationMode.Default; clientContext.Credentials = new SharePointOnlineCredentials(userName, pwd); new ThemeManager().DeployContosoThemeToWeb(clientContext, clientContext.Web, “MyTheme”, Path.Combine(AppDomain.CurrentDomain.BaseDirectory, “Files/Custom/mytheme.spcolor”), string.Empty, Path.Combine(AppDomain.CurrentDomain.BaseDirectory, “Files/Custom/mypic.jpg”), “seattle.master”); new ThemeManager().SetThemeBasedOnName(clientContext, clientContext.Web, “MyTheme”); Console.WriteLine(“Theme […]