Check for seekable stream for malformed uri handling #340

Job	Run time
Validate generated files	4m 19s
Build and Test (debug, net35, windows-latest)	7m 44s
Event File	2s
Build and Test (debug, net40, windows-latest)	8m 18s
Build and Test (debug, All, windows-latest)	14m 24s
Build and Test (debug, All, ubuntu-latest)	6m 4s
Build and Test (debug, All, macos-latest)	16m 18s
Build and Test (release, net35, windows-latest)	7m 13s
Build and Test (release, net40, windows-latest)	7m 0s
Build and Test (release, All, windows-latest)	13m 21s
Build and Test (release, All, ubuntu-latest)	5m 16s
Build and Test (release, All, macos-latest)	8m 1s
	1h 38m 0s

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