/// <summary>
/// Checks extended attribute existence.
/// </summary>
/// <param name="info"><see cref="FileSystemInfo"/> instance.</param>
/// <param name="attribName">Attribute name.</param>
/// <returns>True if attribute exist, false otherwise.</returns>
public static async Task <bool> HasExtendedAttributeAsync(this FileSystemInfo info, string attribName)
{
if (info == null)
{
throw new ArgumentNullException("info");
}
if (string.IsNullOrEmpty(attribName))
{
throw new ArgumentNullException("attribName");
}
return(await extendedAttribute.GetExtendedAttributeAsync(info.FullName, attribName) != null);
}
/// <summary>
/// Gets extended attribute or null if attribute or file not found.
/// </summary>
/// <typeparam name="T">The value will be automatically deserialized to the type specified by this type-parameter.</typeparam>
/// <param name="info"><see cref="FileSystemInfo"/> instance.</param>
/// <param name="attribName">Attribute name.</param>
/// <returns>Attribute value.</returns>
public static async Task <T> GetExtendedAttributeAsync <T>(this FileSystemInfo info, string attribName) where T : new()
{
if (info == null)
{
throw new ArgumentNullException("info");
}
if (string.IsNullOrEmpty(attribName))
{
throw new ArgumentNullException("attribName");
}
string attributeValue = await extendedAttribute.GetExtendedAttributeAsync(info.FullName, attribName);
return(Deserialize <T>(attributeValue));
}