Why is this an issue?
StringBuilder is more efficient than string concatenation, especially when the operator is repeated over and over as in loops.
Noncompliant code example
Module Module1
Sub Main()
Dim foo = ""
foo &= "Result: " ' Compliant - outside of loop
For i = 1 To 9
foo &= i ' Noncompliant
Next
End Sub
End Module
Compliant solution
Module Module1
Sub Main()
Dim foo = New System.Text.StringBuilder
foo.Append("Result: ") ' Compliant
For i = 1 To 9
foo.Append(i) ' Compliant
Next
End Sub
End Module
