Disable Expect100Continue and how to sub-class S3 Requests

^{Originally posted by **DetlefGolze** June 26, 2024}
I want to disable the Expect100Continue header and thought that it is as easy as creating a derived class of PutObjectRequest which already has an overridable property for this:

```
public partial class MyPutObjectRequest : PutObjectRequest
{
public MyPutObjectRequest()
{
// This is the default setting in base library
//
MyExpect100Continue = true;
}

public bool MyExpect100Continue { get; set; }

protected override bool Expect100Continue
{ get { return MyExpect100Continue; } }
}
```

So far so good. This compiles and appears to do what I expect. However, the AmazonS3ControlEndpointResolver uses the name of the request class to implement some request specific behavior causing requests to fail which use an unknown type.

So, two questions:
Is there a better way to disable Expect100Continue? I suppose it is not used as intended anyway and only generates overhead.

Is there an official way to create sub-classes of Request classes? Except of the above example I was hoping that I can use this to pass data from and to an AfterResponseEvent. My S3Client is shared by many threads and this would make life much easier.
We could add a request property which returns the expected RequestName or just use something like this in AmazonS3ControlEndpointResolver:
```
if (request is PutObjectRequest)
{
}
```