Do not use weird implementation of contains (#5672)
Do not use weird implementation of contains (#5672)


syeerzy/visualfsharp,brettfo/visualfsharp,brettfo/visualfsharp,syeerzy/visualfsharp,dsyme/fsharp,cloudRoutine/FSharp.Compiler.Service,syeerzy/visualfsharp,cloudRoutine/FSharp.Compiler.Service,dsyme/fsharp,syeerzy/visualfsharp,brettfo/visualfsharp,syeerzy/visualfsharp,brettfo/visualfsharp,dsyme/fsharp,dsyme/fsharp,dsyme/fsharp,dsyme/fsharp,syeerzy/visualfsharp,cloudRoutine/FSharp.Compiler.Service,brettfo/visualfsharp,dsyme/fsharp,brettfo/visualfsharp