Cosmos : Get all items from a partition in a container in c# / .Net #CosmosClient

I created a container to store user information for customers. The partitionKey is customerId. I want to read all items in a logical partition with customerId = X, that should return all user records with customerId = X. Is such an API available in CosmosClient in .NET SDK?

Example :

class User
{
      string customerId,
      string userId,
      string userName
}

Assuming you are using SQL API, you can use Azure Cosmos DB SDK to fetch all the Users for your partition key. Here is the sample code:

var client = new CosmosClient("COSMOS_CONNECTION_STRING");
var container = cosmosClient.GetContainer("DATABASE_NAME", "CONTAINER_NAME");
var queryDefinition = new QueryDefinition("SELECT * FROM c")
var iterator = container.GetItemQueryIterator<User>(queryDefintion,
            requestOptions: new QueryRequestOptions()
            {
                PartitionKey = new PartitionKey("CUSTOMER_ID")                                                                      
            });

var results = new List<User>();

while (iterator.HasMoreResults)
{
     var result = await iterator.ReadNextAsync();
     results.AddRange(result.Resource);
}

return results;