Pull request #64: Feature/VECTO-1440 change sourcecode from switch functions...

Pull request #64: Feature/VECTO-1440 change sourcecode from switch functions to switch pattern matching

Merge in VECTO/vecto-dev from VECTO/mk_vecto-dev:feature/VECTO-1440-change-sourcecode-from-switch-functions-to-switch-pattern-matching to develop

* commit 'd08c688d': (36 commits)
  corrected refactoring error (syntax)
  refactored null-checks to null-coalescing operator
  renamed constant "NOT_AVAILABLE" (typo)
  wrong string identifier in string.Format
  string interpolation
  string interpolation
  simplified conditions that are always true or false (+codeformatting)
  variables are always null
  code formatting
  removed condition which is always true
  removed unused code
  value is always null
  removed unneccessary imports
  removed redunant .ToString methods.
  inlined string literals and format specifier
  applied format-strings everywhere where they shortened the code and improved readability.
  removed redundant type specifier
  inlined out variables
  removed redundant "as" typecasts
  removed empty statements (redundant semicolons)
  ...