SqlBulk copy filed with conflict in datatypes

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C#

Hi Friends,

I want to dump some bulk data from tab delimited text file to database table using SQLBulkcopy.

Here my issue is my database tables are having columns with datatype as nvarchar whereas my datatable defined with columns datatype as String which throws an exception as follows:

The given value of type String from the data source cannot be converted to type nvarchar of the specified target column.

Please suggest me how to define a column datatype as nvarchar rather than string for a datatable.

dtData.Columns.Add("RegionCode", typeof(string));

or please suggest me any alternative.

Thank You..