"Data Type" argument can not be null
<p>I am getting an error when trying to execute the application in .Net near the column (premium to date) (Highlighted in the code below) and this is the newly added column in my application and after adding it I was not able to run the application .</p>

<pre><code>private DataView getPremiumsFromCoverages()
    {
        DataTable dtPremium = new DataTable("Premium");

        dtPremium.Columns.Add(COLUMN_PREMIUM_BREAKDOWN, System.Type.GetType("System.String"));
        dtPremium.Columns.Add(COLUMN_PREMIUM_PERCENT, System.Type.GetType("System.Decimal"));
        dtPremium.Columns.Add(COLUMN_PREMIUM, System.Type.GetType("System.String"));
        dtPremium.Columns.Add(COLUMN_PREMIUM_HAZARDLEVEL, System.Type.GetType("System.String"));
        **dtPremium.Columns.Add(COLUMN_PREMIUMTODATE, System.Type.GetType("system.Decimal"));**

        OptionEXC currOption = this._Account.CurrentRisk.Options.FindBy_OptionNum(this.OptionNum);
        CoverageEXC covEXC;
        HazardLevelCollection hazardLevelColl = new HazardLevelCollection();
</code></pre>
