# Issues with severity Blocker
A Blocker issue cannot move to production, it must be fixed. Severity is inferred from the issue annual interest and thresholds in Project Properties > Issue and Debt.
CQLinq source
This trend metric is written in CQLinq, C# LINQ over the NDepend code model. It ships with every new NDepend project: you can read it, adapt it, or use it as a starting point for your own custom rules.
// <TrendMetric Name="# Issues with severity Blocker" Unit="issues"/>
from issue in Issues
where issue.Severity == Severity.Blocker
select new { issue, issue.Debt, issue.AnnualInterest, issue.Severity }
//<Desc>
// A **Blocker** issue cannot move to production, it must be fixed.
// Severity is inferred from the issue *annual interest* and thresholds in
// Project Properties > Issue and Debt.
//</Desc>
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