If you are familiar with standard ASP.NET Themes and use them widely across web projects, you can utilize DevExpress Themes in a similar way. To apply a pre-packaged DevExpress Theme or a custom theme, copy the required skin files to your project's App_Themes folder. The DevExpress ASPxThemeDeployer tool can assist you in deploying theme resource files from a theme assembly (for ASPxThemes or a custom theme assembly).
We recommend that you utilize the DevExpress theming mechanism instead of the ASP.NET mechanism. Note that if both mechanisms are used to specify a theme, the DevExpress mechanism will be applied. If you wish to utilize the ASP.NET theming mechanism instead, ensure that the theme attribute of the themes DevExpress section is empty.