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//For complete examples and data files, please go to https://github.com/groupdocsmetadata/GroupDocs_Metadata_NET
public class PhotoCleaner
{
    // absolute path to the GroupDocs.Metadata license file.
    private const string LicensePath = @"GroupDocs.Metadata.lic";

    // absolute path to the photos directory.
    public string CleanerPath { get; set; }

    static PhotoCleaner()
    {
        /* set product license 
         * uncomment following function if you have product license
         * */
        //SetInternalLicense();
    }

    public PhotoCleaner(string cleanerPath)
    {
        // check if directory exists
        if (!Directory.Exists(Common.MapSourceFilePath( cleanerPath)))
        {
            throw new DirectoryNotFoundException("Directory not found: " + cleanerPath);
        }
        // set property
        this.CleanerPath = cleanerPath;
    }
    /// <summary>
    /// Applies the product license
    /// </summary>
    private static void SetInternalLicense()
    { 
        License license = new License();
        license.SetLicense(LicensePath);
    }
    /// <summary>
    /// Removes GPS data and updates the image files in a directory
    /// </summary>
    public void RemoveExifLocation()
    {
        // Map directory in source folder
        string sourceDirectoryPath = Common.MapSourceFilePath(this.CleanerPath);

        // get array of file in specific directory
        string[] files = Directory.GetFiles(sourceDirectoryPath);

        foreach (string path in files)
        {
            // get EXIF data if exists
            ExifMetadata exifMetadata = (ExifMetadata)MetadataUtility.ExtractSpecificMetadata(path, MetadataType.EXIF);

            if (exifMetadata != null)
            {
                ExifInfo exifInfo = exifMetadata.Data;

                if (exifInfo.GPSData != null)
                {
                    // set altitude, latitude and longitude to null values
                    exifInfo.GPSData.Altitude = null;
                    exifInfo.GPSData.Latitude = null;
                    exifInfo.GPSData.LatitudeRef = null;
                    exifInfo.GPSData.Longitude = null;
                    exifInfo.GPSData.LongitudeRef = null;
                }

                // and update file
                MetadataUtility.UpdateMetadata(path, exifMetadata);
            }
        }
        Console.WriteLine("Press any key to exit.");
    }
}