Merge pull request #84 from microsoft/waldo/guidelineUnnecessaryElse

Unnecessary 'else'

content/BCBestPractices/Readability/unnecessary-else/index.md

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+title = "Unnecessary 'else'"
+weight = 1270
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+
+<_Created by Microsoft, Described by waldo_\>
+
+## Description
+`else` should not be used when the last action in the `then` part is an `exit`, `break`, `skip`, `quit`, `error`. 
+
+## Bad code
+
+```al
+    procedure SomeProcedure()
+    begin
+        if IsAdjmtBinCodeChanged then
+            Error(AdjmtBinCodeChangeNotAllowedErr,...)
+        else
+            Error(BinCodeChangeNotAllowedErr,...);
+    end;
+```
+
+## Good code
+```al
+    procedure SomeProcedure()
+    begin
+        if IsAdjmtBinCodeChanged then
+            Error(AdjmtBinCodeChangeNotAllowedErr,...)
+        Error(BinCodeChangeNotAllowedErr,...);
+    end;
+```
+
+
+## [Discussions](https://github.com/microsoft/alguidelines/discussions/categories/bc-best-practices?discussions_q=unnecessary+else+category%3A%22BC+Best+Practices%22)
+
+You can find discussions on all "Best Practices" [here](https://github.com/microsoft/alguidelines/discussions/categories/bc-best-practices).
+
+If you don't find the discussion of this guideline, please feel fee to create a new one with the same title as this article.