如果OdbcConnection.Open()花费的时间太长，我如何取消它？

OdbcConnection conn = new OdbcConnection(connectionString);
conn.ConnectionTimeout = 5;
conn.Open();

using System.Threading;
using System.Threading.Tasks;

public static async Task<bool> OpenConnectionAsync(OdbcConnection conn, int timeoutSeconds)
{
    CancellationTokenSource cts = new CancellationTokenSource();
    cts.CancelAfter(timeoutSeconds * 1000);

    try
    {
        await conn.OpenAsync(cts.Token);
        return true;
    }
    catch (OperationCanceledException)
    {
        return false;
    }
}

OdbcConnection conn = new OdbcConnection(connectionString);
bool success = await OpenConnectionAsync(conn, 5);

using System.Threading;

public static bool OpenConnectionWithTimeout(OdbcConnection conn, int timeoutSeconds)
{
    bool success = false;
    Thread thread = new Thread(() =>
{
    try
    {
        conn.Open();
        success = true;
    }
    catch { }
});
thread.Start();
thread.Join(timeoutSeconds * 1000);

if (thread.IsAlive)
{
    thread.Abort();
}
return success;
}

OdbcConnection conn = new OdbcConnection(connectionString);
bool success = OpenConnectionWithTimeout(conn, 5);