Unit testing classes that implement IXmlSerializable

I have seen unit tests that test serialization by writing to the file system and, though it serves the same purpose, I am not a huge fan of having to have FileSystem permissions applied to my unit testing framework unless I am intentionally trying to write something to the filesystem in my application. So, here is a unit test template I have used to test a class’ implementation of IXmlSerializable.

public void ReadReturnsEquatableObjectToObjectWritten() {
    MemoryStream stream = new MemoryStream();
    IXmlSerializable xmlSerializableObject = new MyXmlSerializableObject();
    //Set values on the xmlSerializableObject
    IXmlSerializable deserializedXmlSerializableObject = new MyXmlSerializableObject();
    using (XmlWriter writer = new XmlTextWriter(stream, Encoding.UTF8)) {
        stream.Seek(0, SeekOrigin.Begin);
        using (XmlReader reader = XmlReader.Create(stream)) {
    //Assert values on deserialized object are as expected.

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