How to pass a input parameter _ headertosearch in Predicate

Then, how to pass a input parameter _ headertosearch in Predicate?

1. To do that, we need to a new object called listmatcher-

 
Public classListmatcher{Private string_ Headertosearch;PublicListmatcher (StringHeadertosearch) {_ headertosearch = headertosearch ;}Public boolPredicate (SprintbacklogitemITEM ){ReturnItem. Title. startswith (_ headertosearch,Stringcomparison. Invariantcultureignorecase );}}
 

2. Next, I initialized the listmatcher object and use the headertosearch to filter the items-

ListmatcherMatcher =NewListmatcher("QA");This. Findall (matcher. predicate );
 

Done.