c#通过MongoDB.Driver给mongdb创建索引

var connectionString = "mongodb://127.0.0.1:27011/qimenlogs";
var client = new MongoClient(connectionString);
var server = client.GetServer();
MongoDatabase db = server.GetDatabase("qimenlogs");
MongoCollection cc= db.GetCollection("cheshi");
cc.CreateIndex("PrimaryAccount");