RedisHealthCheck.cs

public class RedisHealthCheck : IHealthCheck
{
    private readonly IConnectionMultiplexer _connectionMultiplexer;

      public RedisHealthCheck(IConnectionMultiplexer connectionMultiplexer)
      {
          _connectionMultiplexer = connectionMultiplexer;
      }

      public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = new CancellationToken())
      {
          try
          {
              var database = _connectionMultiplexer.GetDatabase();
              database.StringGet("health");
              return Task.FromResult(HealthCheckResult.Healthy());
          }
          catch (Exception exception)
          {
              return Task.FromResult(HealthCheckResult.Unhealthy(exception.Message));
          }
      }
  }