ODP.NET

Managed ODP.NET 21.3 supports UDTs and .NET custom types. You can download this version from NuGet.
https://www.nuget.org/packages/Oracle.ManagedDataAccess/

Hello,
Thanks for the solution. There are so many dependencies need to be installed with Oracle.ManagedDataAccess 21.3.0 .
System.Text.Json (>= 5.0.2)
and to install System.Text.Json need to install below dependencies:
Microsoft.Bcl.AsyncInterfaces (>= 5.0.0)
System.Buffers (>= 4.5.1)
System.Memory (>= 4.5.4)
System.Numerics.Vectors (>= 4.5.0)
System.Runtime.CompilerServices.Unsafe (>= 5.0.0)
System.Text.Encodings.Web (>= 5.0.1)
System.Threading.Tasks.Extensions (>= 4.5.4)
System.ValueTuple (>= 4.5.0)
and many more.

.NET (Core) is much more modular than .NET FW. That's good for customizing the runtime and reducing deployment size.
The design also means when a piece of functionality exists in another dependency, which itself can have dependencies, all those libraries have to be included.
System.Text.Json is needed to process JSON data types. ODP.NET 21c has added the ability to use binary JSON and further capabilities to manipulate JSON, which is what necessitated the requirement.