I created bucket as below and then executing insert/upsert queries. They are putting data into database by converting in camelcase. I am using .NET SDK 2.7.11
var sourceConfig = new ClientConfiguration
{
Servers = lstURL
};
Cluster cluster = new Cluster(sourceConfig);
cluster.Configuration.SerializationSettings.ContractResolver = new DefaultContractResolver();
cluster.OpenBucket(bucketName);
_DestinationDBBucket.Insert(doc);