I have an Windows Application which calls an POST API . 
I am attaching heavy payload in JSON with it. So with certain payload (8384132 byte) I can see that i am able to hit the API method. Where as more then this payload (i.e. 8466812 byte), i am unable to hit the API. 
I am getting internal server Error.
Error details doesn't give any relevant error message.
NB--> API owned by us only.
Tried all possible Byte i.e. Max & min . Finally got this boundary of byte.
 
    