public void Test_GetRelativePathWithError3() { IAbsoluteFilePath filePathTo = @"C:\Dir1\File.txt".ToAbsoluteFilePath(); IAbsoluteDirectoryPath absoluteDirectoryPathFrom = @"D:\Dir1".ToAbsoluteDirectoryPath(); Assert.IsFalse(filePathTo.CanGetRelativePathFrom(absoluteDirectoryPathFrom)); string failureReason; Assert.IsFalse(filePathTo.CanGetRelativePathFrom(absoluteDirectoryPathFrom, out failureReason)); Assert.IsTrue(failureReason == @"Cannot compute relative path from 2 paths that are not on the same volume PathFrom = ""D:\Dir1"" PathTo = ""C:\Dir1\File.txt"""); filePathTo.GetRelativePathFrom(absoluteDirectoryPathFrom); }