SQLitePCLRaw is a Portable Class Library (PCL) for low-level (raw) access to SQLite. Packages named 'SQLitePCLRaw.provider.*' (like this one) are 'plugins' that allow SQLitePCLRaw.core to access the native SQLite library. This provider does DllImport of 'e_sqlcipher', the unofficial SQLCipher builds provided with SQLitePCLRaw.
$ dotnet add package SQLitePCLRaw.provider.e_sqlcipherNo README available.