This can be used to hash key/value pairs, that should be used as a ID in e.g. a database like CosmosDB. This will produce the same length key, no matter how many key/value pairs are supplied.

IdFactory.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Security.Cryptography;
using System.Text;

public static class IdFactory 
{
    public static string CreateId(IEnumerable<(string key, string value)> kvps)
    {
        using var crypt = new SHA256Managed();

        var tagBytes = TagsToBytes(kvps);
        var hashedTags = crypt.ComputeHash(tagBytes);

        return ConvertToString(hashedTags);
    }

    private static string ConvertToString(byte[] hashedTags)
    {
        var builder = new StringBuilder();

        foreach (var @byte in hashedTags)
        {
            builder.Append(@byte.ToString("x2", CultureInfo.InvariantCulture));
        }

        return builder.ToString();
    }

    private static byte[] TagsToBytes(IEnumerable<(string key, string value)> kvps)
    {
        var builder = new StringBuilder();

        foreach (var tag in kvps.OrderBy(tag => tag.key))
        {
            builder.Append(tag.Key);
            builder.Append(tag.Value);
        }

        return Encoding.UTF8.GetBytes(builder.ToString());
    }
}