C# Type Conversion

I'm working on my first c# AutoCAD addin, and I'm having one of my
stupid-moments. I'm trying to get an AcadText object. I keep getting This
error

"An unhandled exception of type 'System.InvalidCastException' occurred in
mscorlib.dll

Additional information: Object must implement IConvertible."

Anyone have any ideas? My head hurts haha. This was so much easier with VB
6.

here's my code

private void cbtSelect_Click(object sender, System.EventArgs e)

{

object oPoint;

object actTemp;

AcadText actField;

// System.IConvertible actTemp;


this.Hide();


oAcadDoc.Utility.GetEntity(out actTemp, out oPoint,"Select Text: ");

this.Show();

actField = (AcadText)Convert.ChangeType(actTemp,typeof(object )); <-- error
occurs here

acadUtils.setXDataValues(actField,
cboTableList.Text,lbxFields.SelectedItem.ToString());

}

 

never mind, stupid-moment is over. I got it.

use this
actField =(AcadText)actTemp;

instead of this

actField = (AcadText)Convert.ChangeType(actTemp,typeof(object ));