/// <summary>
/// Gets the content type of a file from this string
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns></returns>
/// <exception cref="System.ApplicationException">When the mime type cannot be determined.</exception>
public static BaseMime GetMimeType(this string filename)
{
var mimeTypes = MimeTypes.Generate();
var extension = Path.GetExtension(filename);
if (string.IsNullOrEmpty(extension))
{
extension = "";
}
extension = extension.Replace(".", "").ToLower();
var result = mimeTypes.FirstOrDefault(m => m.Extensions.Contains(extension));
if (result == null)
{
throw new ApplicationException($"Unkown extension to get mime type for filename '{filename}'");
}
return(result);
}