Sets or returns whether NULL values in the imported dataset be ignored or converted to blank cells. Blank cells will override existing formulas or cell values.

 public boolean IgnoreNulls{ get; set; }
Public Property IgnoreNulls() As Boolean

          //--- Get IgnoreNulls
          bool ignoreNulls = importProps.ignoreNulls;

          //--- Set IgnoreNull
          importProps.IgnoreNulls = true;
        

          '--- Get IgnoreNulls
          Dim ignoreNulls As Boolean = importProps.IgnoreNulls

          '--- Set IgnoreNulls
          importProps.IgnoreNulls = True