Instead of allocating new byte arrays each time you perform a cryptographic operation (such as signing, encryption, or converting data to/from Base64), you can use a buffer pool. A buffer pool maintains a set of preallocated buffers that can be reused, reducing the need for frequent allocations. In .NET, the ArrayPool<T> class is ideal for this purpose.

The code has been updated to use XmlReader and XmlWriter for efficient XML parsing and writing. This change improves the performance of loading and saving licenses by ignoring unnecessary whitespace during reading, and enabling indentation during writing.

Introduced a static XmlReaderSettings object with pre-configured settings to optimize XML parsing in the License class. This change reduces unnecessary processing by ignoring whitespace, comments, and processing instructions during XML reading. The new settings are now used when creating an XmlReader instance for loading licenses from a stream.