Problem with ColumnChanging in the BeginInit()

[Microsoft News Group]

I am adding some field validation throught column changing with partial
classes. I am debugging it and when it hits

this.ColumnChanging += ValidateColumn;

It never goes to the method

void ValidateColumn(object sender, DataColumnChangeEventArgs e)

Any ideas why? Code is below!

Public partial class Bassco

{

public partial class bcr_price_rangesDataTable

{

public override void BeginInit()

{

this.ColumnChanging += ValidateColumn;

}

void ValidateColumn(object sender, DataColumnChangeEventArgs e)

{

if (e.Column.Equals(this.MinColumn))

{

if((decimal)(e.ProposedValue) 5)

{

throw new ArgumentException("Min cannot be less than zero", "MIN");

}

}

}

}

}