title: Merging two CSV Files in Azure Data Factory by using custom .NET activity
body: <p>I have two CSV file which contains which contains many n-columns.I have to merge this two csv files with a single CSV file which having one unique column from the both input file.</p>
  
  <p>I browsed thoroughly all the blogs and sites.All will result into using the custom .NET Activity.So i just go through <a href="https://docs.microsoft.com/en-us/azure/data-factory/data-factory-use-custom-activities" rel="nofollow noreferrer">this site</a></p>
  
  <p>But still am not able to figure out which part in the C# Coding.Can any one share the code for how to merge this two CSV files using custom .NET Activity in Azure Data Factory.</p>