codeql/change-notes/1.19/analysis-csharp.md

Improvements to C# analysis

General improvements

• The control flow graph construction now takes simple Boolean conditions on local scope variables into account. For example, in if (b) x = 0; if (b) x = 1;, the control flow graph will reflect that taking the true (resp. false) branch in the first condition implies taking the same branch in the second condition. In effect, the first assignment to x will now be identified as being dead.

New queries

Query	Tags	Purpose
@name of query (Query ID)	Tags	Aim of the new query and whether it is enabled by default or not

Changes to existing queries

| Inconsistent lock sequence (cs/inconsistent-lock-sequence) | More results | This query now finds inconsistent lock sequences globally across calls. |

| @name of query (Query ID)| Impact on results | How/why the query has changed |

Changes to QL libraries