What's the period of RNGCryptoServiceProvider?

I need information about RNG caracteristics. In particular I was searching the period of RNGCryptoServiceProvider for C# Net Framework 4.5 (see https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.rngcryptoserviceprovider?view=netcore-3.1) , but I wasn't able to find anything. Could someone help me? Thank you

Just to make an example the period of a classical implementation of Mersenne Twister is 2^19937 - 1 (see https://en.wikipedia.org/wiki/Mersenne_Twister#Advantages)