I get the following error from asnp when I try to add drives in the InitializeDefaultDrives method.
"Object reference not set to an instance of an object."
Here is code that reproduces the problem.

    protected override Collection<PSDriveInfo> InitializeDefaultDrives()
    {
      Collection<PSDriveInfo> drives = new Collection<PSDriveInfo>();
// PSDriveInfo psDrive = new PSDriveInfo("myDrive", base.ProviderInfo, "myRoot", "Description", base.Credential);
      PSDriveInfo psDrive = new PSDriveInfo("myDrive", ProviderInfo, "myRoot", "Description", Credential);
      drives.Add(psDrive);
      return drives;
    }// InitializeDefaultDrives

I get the same error even if I use the base ProviderInfo and Credentials. I don't get the error if I remove the "drives.Add(psDrive);" line.

Any ideas?
Thanks,
Phil

I figured out what I was doing wrong. My provider's NewDrive method gets called with the drive added in InitializeDefaultDrives. NewDrive was accessing the provider's DynamicParameters property which was not yet set through a call to my provider's NewDriveDynamicParameters method. I just needed to check whether DynamicParameters was null before attempting to access the expected items.