title: Set constant value to some columns in SqlBulkCopy
body: <p>I'm trying transfer data from <em>"csv"</em> file to SQL Database. Is it possible to map some fields by default vale which not exsits in <em>"csv"</em> file?
  Something like shown below:
  <code>bulkCopy.ColumnMappings.Add("Destenition_column_name", "constant_value");</code></p>
  
  <p>Thanks for advance!</p>