Fix | NRE on assigning null to SqlConnectionStringBuilder.Encrypt

[DavoudEshtehari]

Null Reference Exception with SqlConnectionStringBuilder.Encrypt = null.

[codecov]

Codecov Report

Base: 71.37% // Head: 71.39% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (7c56cb2) compared to base (4dafe91).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1778      +/-   ##
==========================================
+ Coverage   71.37%   71.39%   +0.02%     
==========================================
  Files         293      293              
  Lines       61376    61382       +6     
==========================================
+ Hits        43808    43826      +18     
+ Misses      17568    17556      -12     

Flag	Coverage Δ
addons	92.38% <ø> (ø)
netcore	75.01% <100.00%> (+0.02%)	⬆️
netfx	69.22% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...t/Data/ProviderBase/DbConnectionPool.NetCoreApp.cs	75.00% <ø> (-6.82%)	⬇️
...rc/Microsoft/Data/ProviderBase/DbConnectionPool.cs	85.19% <100.00%> (-0.48%)	⬇️
...osoft/Data/SqlClient/SqlConnectionEncryptOption.cs	93.10% <100.00%> (+6.73%)	⬆️
...osoft/Data/SqlClient/SqlConnectionStringBuilder.cs	88.60% <100.00%> (+0.01%)	⬆️
...crosoft/Data/ProviderBase/DbReferenceCollection.cs	92.63% <0.00%> (-3.16%)	⬇️
...c/Microsoft/Data/SqlClient/SqlConnectionFactory.cs	68.85% <0.00%> (-0.82%)	⬇️
...crosoft/Data/SqlClient/SqlInternalConnectionTds.cs	72.88% <0.00%> (-0.40%)	⬇️
...c/Microsoft/Data/SqlClient/TdsParserStateObject.cs	81.57% <0.00%> (ø)
...nt/netfx/src/Microsoft/Data/SqlClient/TdsParser.cs	70.98% <0.00%> (+0.07%)	⬆️
... and 5 more

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