DateTime von .NET zu Smalldatetime in SQL

Ich habe es mit SQL Server 2008 R2 Express versucht.

Hier ist die gespeicherte Beispielprozedur, die ich geschrieben habe:

CREATE PROCEDURE [dbo].[ShowGivenSmallDateTimeValue] 
    @givenSmallDateTime smalldatetime
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Simply return the given small date time value back to sender.
    SELECT @givenSmallDateTime
END

Und hier ist der C#-Code zum Ausführen der Prozedur:

var connectionBuilder = new SqlConnectionStringBuilder();
connectionBuilder.DataSource = "localhost\\sqlexpress";
connectionBuilder.IntegratedSecurity = true;

var now = DateTime.UtcNow;

using (var connection = new SqlConnection(connectionBuilder.ConnectionString))
using (var command = new SqlCommand())
{
    command.Connection = connection;
    command.CommandType = CommandType.StoredProcedure;
    command.CommandText = "ShowGivenSmallDateTimeValue";
    command.Parameters.Add(new SqlParameter("@givenSmallDateTime", SqlDbType.SmallDateTime) { Value = now });

    connection.Open();
    var result = (DateTime)command.ExecuteScalar();
    var difference = result - now;

    Console.WriteLine("Due to the smalldatetime roundings we have a difference of " + difference + ".");
}

Und es funktioniert einfach.

DateTime von .NET zu Smalldatetime in SQL - wie mache ich Abfragen?