landing_page/qdrant-landing/content/documentation/headless/snippets/update-collection/hnsw-and-quantization/csharp.cs

using Qdrant.Client;
using Qdrant.Client.Grpc;

public class Snippet
{
	public static async Task Run()
	{
		var client = new QdrantClient("localhost", 6334);

		await client.UpdateCollectionAsync(
			collectionName: "{collection_name}",
			hnswConfig: new HnswConfigDiff { EfConstruct = 123 },
			vectorsConfig: new VectorParamsDiffMap
			{
				Map =
				{
					{
						"my_vector",
						new VectorParamsDiff
						{
							HnswConfig = new HnswConfigDiff { M = 3, EfConstruct = 123 }
						}
					}
				}
			},
			quantizationConfig: new QuantizationConfigDiff
			{
				Scalar = new ScalarQuantization
				{
					Type = QuantizationType.Int8,
					Quantile = 0.8f,
					AlwaysRam = true
				}
			}
		);
	}
}