/// <summary>
/// Creates a new key-value item, if not found. If exists, updates the associated value.
/// </summary>
/// <param name="nameSpace"></param>
/// <param name="key"></param>
/// <param name="value"></param>
public void Put(string nameSpace, string key, string value)
{
string nameSpaceKey = GetNameSpaceKey(nameSpace, key);
KeyValueStore.CreateOrUpdate(nameSpaceKey, value);
}