setting properties on a blob

[C#]

public static async Task SetBlobPropertiesAsync(CloudBlob blob)
{
    Console.WriteLine("Setting blob properties.");

    try
    {
        // You must set the MIME ContentType every time  
        // when the properties are updated or the field will be cleared.
        blob.properties.ContentType = "text/plain",
        blob.properties.ContentLanguage = "en-us",

        // Set the blob's properties.
        await blob.SetPropertiesAsync();
    }
    catch (RequestFailedException e)
    {
        Console.WriteLine("HTTP error code {0}: {1}",
        e.RequestInformation.HttpStatusCode,
        e.RequestInformation.ErrorCode);
        Console.WriteLine(e.Message);
        Console.ReadLine();
    }
}