# Unexpected error with `-usequotes asneeded`
PS> $a=@(
           [pscustomobject]@{a=2; b=5},
           [pscustomobject]@{a=4; b=$null}
       )
PS> $a | convertto-csv -d `t -usequotes asneeded
a       b
2       5

ConvertTo-Csv: Object reference not set to an instance of an object.

PS> $a | convertto-csv -d `t -usequotes never
a       b
2       5
4

PS> $a | convertto-csv -d `t -usequotes always
"a"     "b"
"2"     "5"
"4"

# this does not work
PS> get-winevent -logname application |
        ? {$_.message -eq $null} |
        select -first 1 timecreated,providername,message |
        export-csv -d `t -usequotes asneeded -path out.txt

TimeCreated     ProviderName    Message

Export-Csv: Object reference not set to an instance of an object.

# this works
PS> get-winevent -logname application |
        ? {$_.message -eq $null} |
        select -first 1 timecreated,providername,message |
        fl *

TimeCreated  : 4/7/2020 6:32:19 PM
ProviderName : gupdate
Message      :

# this works
PS> get-winevent -logname application |
        ? {$_.message -eq $null} |
        select -first 1 timecreated,providername,message |
        convertto-csv -d `t

"TimeCreated"   "ProviderName"  "Message"
"4/7/2020 6:32:19 PM"   "gupdate"