Fix simple-no code change- compiler warnings.

[emreyigit]

Fixes simple documentation and few code usage compiler warnings.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.62%. Comparing base (89b23e9) to head (84d26bf).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
.../Hazelcast.Net/Protocol/Models/VectorPairHolder.cs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1050      +/-   ##
==========================================
- Coverage   82.65%   82.62%   -0.04%     
==========================================
  Files        1060     1060              
  Lines       25820    25820              
==========================================
- Hits        21341    21333       -8     
- Misses       4479     4487       +8     

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