SQL connection string reader Date time data type format

Question

I am using below script to fetch data fields from DB. Script runs fine but at the end receiving following error as 
Exception calling "GetDateTime" with "1" argument(s): "Specified cast is not valid."
At line:6 char:36
+     $termdate = $reader.GetDateTime <<<< (23)
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : DotNetMethodException
$sqlconstr = 'Data Source=Server;Initial Catalog=DB;User ID=User;pwd=$XXXX;'
$sqlconn = New-Object system.Data.SqlClient.SqlConnection
$sqlconn.connectionstring = $sqlconstr
$sqlconn.open()
$sqlquery1 = "SELECT * from TERMDB" 
$SqlCmd = New-Object System.Data.SqlClient.SqlCommand ($sqlquery1,$SqlConn)
$reader=$sqlcmd.ExecuteReader()
    while ($reader.read())
        $emp = $reader.GetString(0)
        $fn = $reader.GetString(3)
        $ln = $reader.GetString(5)
$termdate = $reader.GetDate(24)
"$emp,$fn,$ln,$termdate" | out-file -FilePath "C:\testing1.txt" –append
$sqlconn.close()
        Please help with the data type required for Date time.

Answer 1

Thanks.
When i run syntax i gets below error.
$conn = New-Object system.Data.SqlClient.SqlConnection
$conn.connectionstring='Data Source=Server;Initial Catalog=DB;User ID=User;pwd=$XXXX;'
$conn.open()
PS X:\> $cmd=$conn.CreateCommmand()
Method invocation failed because [System.Data.SqlClient.SqlConnection] doesn't contain a method named 'CreateCommmand'.
At line:1 char:26
+ $cmd=$conn.CreateCommmand <<<< ()
    + CategoryInfo          : InvalidOperation: (CreateCommmand:String) [], RuntimeException
    + FullyQualifiedErrorId : MethodNotFound
I will mark it as Answered & open new thread for AD cmdlet.