how to find all files to another destination

I have a file path pointing to a text file on disk, I want to write the details of every file within c:\temp\ overwriting any exisiting text.

this should be in the format ( " : " ) Each file data should be on a new line and teh files of all sub-directories should be included.

here is what I have done so far

public static void WriteAllFileDataToDisk(string filePath)

{

var myfile = filePath.AsFile();

var listoffiles = "c:\\temp\\".AsDirectory().GetFiles(true);

foreach (var y in listoffiles)

{

myfile.WriteAllText("{0} : {1}".FormatWith(y.AsFile().FullName, y.AsFile().Name));

}

it is not working correctly. please let know if you can help.