using System.IO; // create a new file and write data to it string filePath = "data.txt"; using (StreamWriter sw = new StreamWriter(filePath)) { IDataWriter dataWriter = new CustomDataWriter(sw); dataWriter.Initialize(); dataWriter.WriteData("some data to write"); dataWriter.Dispose(); }In this example, we are using the StreamWriter class to create a new file called "data.txt" and initialize a CustomDataWriter object. We then use IDataWriter Initialize to prepare the writer for writing data. Finally, we write some data to the file using the WriteData method and dispose of the data writer. The package library used in this example is likely the .NET Framework or .NET Core, which includes the System.IO namespace and the StreamWriter class. The CustomDataWriter class is likely a custom class that is defined within the application being developed.