[FIX] Undefined property in void return
[FIX] Psr-2 code formatting issue
[FIX] resultProperty Attribute
[FIX] return null value
Merge pull request #5793 from lilobase/SoapDotNetEmptyResult

[Soap\Client\DotNet][FIX] Undefined property in void return
Merge branch 'feature/5793' into develop

Close #5793