C# giving me problems

Question

I am in the process of writing my own controls to replace 3rd party controls (paid) and am currently doing fonts. I have added a property DefaultFont to the DataGridTextColumn

public class DataGridTextColumn : DataGridColumn
{
    public string Text { get; set; }
    public string StringFormat { get; set; }
    public string DefaultFont { get; set; } 
}

Now when I attempt to access this property I get a not found error in the following code:

                    if ((DataGridTextColumn)dgc.DefaultFont == string.Empty)
                    {

                    }

Now for some reason the property does not show and it gets even stranger. I put the following lines of code in and they have no errors (this site really needs fixing as not all copy/paste works the same way).

DataGridTextColumn dg = (DataGridTextColumn)dgc;

var x = dg.DefaultFont;

This is very confusing as one simply does not set a variable for later use.

Answer 1

if (((DataGridTextColumn)dgc).DefaultFont == string.Empty)
{

}