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// For complete examples and data files, please go to https://github.com/groupdocs-editor/GroupDocs.Editor-for-.NET
 public static void ApplyLicense(string filepath)
        {
            // Instantiate GroupDocs.Editor license
            GroupDocs.Editor.License license = new GroupDocs.Editor.License();

            // Apply GroupDocs.Editor license using license path
            license.SetLicense(filepath);
        }

        /// <summary>
        /// Applies GroupDocs.Editor license using stream input
        /// </summary>
        public static void ApplyLicense(Stream licenseStream)
        {
            // Instantiate GroupDocs.Editor license
            GroupDocs.Editor.License license = new GroupDocs.Editor.License();

            // Apply GroupDocs.Editor license using license file stream
            license.SetLicense(licenseStream);
        }