Returning a single date from a database

I need to return a date from a database.  I can't seem to get it to return.  this is what I have so far.  Can anyone help.  thanks

SqlConnection sqlConnection1 = new SqlConnection("MyConnectString");
SqlCommand cmd = new SqlCommand();
DateTime returnValue;

cmd.CommandText = "SELECT PollOpenTo from Polls.Dates";
cmd.CommandType = CommandType.Text;
cmd.Connection = sqlConnection1;

sqlConnection1.Open();

returnValue = cmd.ExecuteScalar();

sqlConnection1.Close();
sherbug1015Asked:
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Éric MoreauSenior .Net ConsultantCommented:
what do you get in your returnValue variable? Any errors?
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sherbug1015Author Commented:
i get an error that it can't convert ExecuteScalar to non-delegate type System.Datetime.  Did you intend to invoke a method
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Éric MoreauSenior .Net ConsultantCommented:
try:

returnValue = (DateTime)cmd.ExecuteScalar();

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