How can I encypt a parameter with Rijndael in C#?

问题

How can I encrypt a parameter variable using the encryption method Rijndael?

I would like to encrypt some parameters in order to post them in an API call.
The key should be in a specific form , 1st Key + IV Key.
In addition , the 1st key should have a specific format.

If anyone is able to provide a code sample for this, it would be awesome.

来源：https://stackoverflow.com/questions/62569677/how-can-i-encypt-a-parameter-with-rijndael-in-c