using System;

public class Test
{
	public static void Main()
	{
		string file = @"D:\Shared\Common\BaseReports\Main.rpt";
		string root = @"D:\Shared\Common\BaseReports";
		
		var fileUri = new Uri(file);
		var rootUri = new Uri(root);
		
		var relUri = rootUri.MakeRelativeUri(fileUri);
		Console.WriteLine(relUri.ToString());
	}
}