ECDSA OpenSSL和BouncyCastle之间的密钥大小差异

I am implementing a 192 bit ECDSA signature in C# using BouncyCastle. It was specified in text by my customer. They sent me a spec in OpenSSL after I started implementing in BouncyCastle. Now I'm having trouble moving keys between OpenSSL and BouncyCastle. I think I must be missing the point of something, and am asking your help to understand how ECDSA 192 works across the two libraries.I am implementing a 192 bit ECDSA signature in