Cannot take the address of, get the size of, or declare a pointer to a managed type

I've done a fair bit of research, but am stuck now as to why I'm still getting this error. I have a struct with the following attributes:

struct Account
{
    //private attributes
    private double mBalance;
    private int mAccountNumber;
    private string mName;
    private string mDateCreated;
}

and am trying to do the following:

class BankManager
{
    //private attributes
    private unsafe Account *mAccounts;
    private unsafe bool *mAccountsAvailable;
    private int mNumberAccounts;
}

Even after turning my class Account to a struct, using "unsafe" for the attributes in class BankManager, and telling the compiler it can use unsafe code (in properties -> Build), I'm still getting this error at

*mAccounts

Any ideas as to why? I'm pretty sure all the types I'm using in the struct are legal to have pointers to in c#. Thanks in advance!