Измислих решение, което работи за мен. Разбира се, имам работа с по-малки бази данни, но това може да реши проблема за някои.
/// <summary>
/// Renames old database to new database by copying all its collected contents
/// ToDO: Add checks and balances to ensure all items were transferred correctly over
/// Disclaimer: use at own risk and adjust to your needs
/// </summary>
/// <param name="currentName"></param>
/// <param name="newName"></param>
public void renameDatabase(string currentName, string newName)
{
this.mongoClient.DropDatabase(newName); //we drop the new database in case it exists
var newDb = mongoClient.GetDatabase(newName); //get an instance of the new db
var CurrentDb = mongoClient.GetDatabase(currentName); //get an instance of the current db
foreach (BsonDocument Col in CurrentDb.ListCollections().ToList()) //work thru all collections in the current db
{
string name = Col["name"].AsString; //getting collection name
//collection of items to copy from source collection
dynamic collectionItems = CurrentDb.GetCollection<dynamic>(name).Find(Builders<dynamic>.Filter.Empty).ToList();
//getting instance of new collection to store the current db collection items
dynamic destinationCollection = newDb.GetCollection<dynamic>(name);
//insert the source items into the new destination database collection
destinationCollection.InsertMany(collectionItems);
}
//removing the old datbase
this.mongoClient.DropDatabase(currentName);
}