I want to rearrange a text file in C#

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C#

I have a gtest generated text file with format like this
................text_file_1......................................

FisheyeLens.
  getCoefficients
  MaxRadius
  DistortUndistortEquidistant
  DistortUndistortEquisolid
  DistortUndistortStereographic
  DistortUndistortOrthographic
  InversePoly
  Rig
  Perlin
Lens.
  DistortUndistort
BrownLens.
  MaxRadius
  DistortUndistort
Environment.
  FloatingPoint
  ComputePrimaryAxis

i want it to be in the following format
..................text_file_2...............................

FisheyeLens.getCoefficients
FisheyeLens.MaxRadius
FisheyeLens.DistortUndistortEquidistant
FisheyeLens.DistortUndistortEquisolid
FisheyeLens.DistortUndistortStereographic
FisheyeLens.DistortUndistortOrthographic
FisheyeLens.InversePoly
FisheyeLens.Rig
FisheyeLens.Perlin
Lens.DistortUndistort
BrownLens.MaxRadius
BrownLens.DistotUndistort
Enviroment.FloatingPoint
Enviroment.ComputerPrimaryAxis

What I have tried:

I have written a code to read the text_file_2

while ( (line=file.ReadLine()) != null)
         {

             writer.WriteStartElement("Test");
             writer.WriteAttributeString("ID", "{AB02A59E-2DF9-4EF4-AD3A-7B14BB3341BC}");
             writer.WriteAttributeString("StartTime", "");
             writer.WriteAttributeString("Description", "Runing Gtest through veracity");
             writer.WriteAttributeString("InstanceName", "RunGTest "+propertyNode);
             writer.WriteAttributeString("Result", "Failed");
             writer.WriteAttributeString("Enabled", "1");
             writer.WriteAttributeString("Checksum", "");
             writer.WriteAttributeString("EndTime", "");


             writer.WriteStartElement("PropertyCollection");
             writer.WriteStartElement("Property");
             writer.WriteAttributeString("Name", "External app path");
             writer.WriteAttributeString("Description", "Specify the path relative to Bin folder or you can specify the absolute path.May use env variable");
             writer.WriteString(textBox1.Text);
             writer.WriteEndElement();//property1

             writer.WriteStartElement("Property");
             writer.WriteAttributeString("Name", "Command line parameters");
             writer.WriteAttributeString("Description", "specify the command line parameter for Gtest");
             writer.WriteString("--gtest_filter =" + line);
             writer.WriteEndElement();//property2

             writer.WriteStartElement("Property");
             writer.WriteAttributeString("Name", "Capture Std Out");
             writer.WriteAttributeString("Description", "Set this to true if the external app uses std out");
             writer.WriteString("1");
             writer.WriteEndElement();//property3

             writer.WriteStartElement("Property");
             writer.WriteAttributeString("Name", "File Name to Capture Std Out");
             writer.WriteAttributeString("Description", "Has effect only when property 'Capture Std Out'is set to true to Capture Std Out");
             writer.WriteString("Output.txt");
             writer.WriteEndElement();//property4

             writer.WriteStartElement("Property");
             writer.WriteAttributeString("Name", "Pass Phrase");
             writer.WriteAttributeString("Description", "Pass phrase to look for in the std out or the output file to determine if the test passed or failed");
             writer.WriteString("FAILED");
             writer.WriteEndElement();//property5

             writer.WriteEndElement();//propertyCollection*/

             writer.WriteEndElement();//Test
             propertyNode += 1;
         }

But i m unsure of how do i do it for text_file_1