That code doesn't display images. All it does is create a string which should point at the image, and add it to an array of other strings.
But...if you are using that path string to access the image file later, then try removing the space:
string path = "E:/ software/Datadog/DataDog/bin/Release/Images/ViewDiagnosisFault_severity scale00.png";
Becomes
string path = "E:/software/Datadog/DataDog/bin/Release/Images/ViewDiagnosisFault_severity scale00.png";
As it is unlikely that the folder name starts with a space - and C# does care about spaces...
[edit]Typos - OriginalGriff[/edit]