Bash script to find dead projects

findDeadProjects.sh

#!/bin/bash

declare -a SOLUTIONS=$(find . -name "*.sln")
declare -a PROJECTS=$(find . -name "*.csproj")

for PROJECT in ${PROJECTS[*]}
do
        PROJECT_NAME=$(basename $PROJECT)
        USED=0

        for SOLUTION in ${SOLUTIONS[*]}
        do
                if( grep $PROJECT_NAME $SOLUTION > 0 )
                then
                        USED=1
                fi
        done

        if(( $USED == 0 ))
        then
                echo "$PROJECT_NAME"
        fi
done