Setting content-encoding and content-type with Amazon API for .NET

Question

How can I set the S3 bucket file header to be the following:

content-encoding: gzip content-type: text/css

I am using Amazon API using the SDK for .NET. I am uploading a file to S3 using the PutObjectRequest. The problem that when the file is uploaded, the content type and content encoding headers aren't beign updated (I've checked via the files properties on Amazon Console).

example:

 request.AddHeader("expires", EXPIRES_DATE);
 request.AddHeader("content-encoding", "gzip");         
 request.ContentType = "text/css";

Also tried:

NameValueCollection metadata = new NameValueCollection();
metadata.Add("content-type", "text/css");
metadata.Add("content-encoding", "gzip");
request.WithMetaData(metadata);

What I'm doing wrong?

Answer 1

The accepted answer was right at the time but the API updated in 2014 so this is the new way

PutObjectRequest request = new PutObjectRequest
{
    BucketName = bucketName,
    ContentType = "text/css",
    Key = filename
};
request.Headers["Content-Encoding"] = "gzip";

Answer 2

In 2019 using the latest API the code will look like this:

PutObjectRequest request = new PutObjectRequest {
    BucketName = bucketName,
    ContentType = "text/css",
    Key = filename
};
request.Headers.ContentEncoding = "gzip";