Powershell merge 2 columns from different files without a key field

I have 2 csv files and have file1.column1, file1.column2, file2.column1, file2.column2. I would like to have out put like below

File1:

Column1, Column2
1,a
2,b
3,c

File2:

Column1, Column2
x, abc
y, def
z, ghi

Output I am expecting is: File3:

File1.column1, File2.column2
1, abc
2, def
3, ghi

@PetSerAl is correct, it appears that you want to merge these on the line number, i.e the index of each row. Here's a contrived example with custom objects, just replace $File1 and $File2 with the output from Import-Csv:

$File1 = @(
[PSCustomObject]@{
    Column1 = 1
    Column2 = "a"
}
[PSCustomObject]@{
    Column1 = 2
    Column2 = "b"
}
[PSCustomObject]@{
    Column1 = 3
    Column2 = "c"
}
)

$File2 = @(
    [PSCustomObject]@{
        Column1 = "x"
        Column2 = "abc"
    }
    [PSCustomObject]@{
        Column1 = "y"
        Column2 = "def"
    }
    [PSCustomObject]@{
        Column1 = "z"
        Column2 = "ghi"
    }
)

for ($i = 0; $i -lt $File1.Count; $i++ )
{
    [PSCustomObject]@{
        "File1.Column1" = $File1[$i].Column1
        "File2.Column2" = $File2[$i].Column2
    }
}