Convert C# bytes array function to vb.net

Question

I am trying to convert this code

public static byte[] NewLine(this byte[] bytes, int feeds = 1)
    {
      return bytes.AddBytes(((IEnumerable<byte>) new byte[feeds]).Select<byte, byte>((Func<byte, byte>) (x => (byte) 10)).ToArray<byte>());
    }

online converters produce this

<System.Runtime.CompilerServices.Extension> _
    Public Function NewLine(ByVal bytes() As Byte, Optional ByVal feeds As Integer = 1) As Byte()
      Return bytes.AddBytes((DirectCast(New Byte(feeds - 1){}, IEnumerable(Of Byte))).Select(Of Byte, Byte)CType(Function(x) CByte(10), Func(Of Byte, Byte)).ToArray())
    End Function

which gives an error

Overload resolution failed because no accessible 'Select' accepts this number of type arguments.

How can I fix this?

that's a very convoluted way of adding 10 to a collection. Note that the value of feeds is ignored and 10 is added all the time. I don't see CType with this converter converter.telerik.com — Slai
– Slai, Commented Aug 11, 2017 at 11:46
i got this with that converter <System.Runtime.CompilerServices.Extension()> _ Public Function NewLine2(ByVal bytes As Byte(), Optional ByVal feeds As Integer = 1) As Byte() Return bytes.AddBytes(DirectCast(New Byte(feeds - 1) {}, IEnumerable(Of Byte)).[Select](Of Byte, Byte)(DirectCast(Function(x) CByte(10), Func(Of Byte, Byte))).ToArray(Of Byte)()) End Function it still has DirectCast instead, which still gives the error above — Oghenero E.
– Oghenero E., Commented Aug 11, 2017 at 11:53

Jon Skeet · Accepted Answer · 2017-08-11 11:33:32Z

3

It's not clear to me why specifying the type arguments fails, but that isn't needed anyway - and the location of CType looks to be broken. If you change the Select call to:

.Select(CType(Function(x) CByte(10), Func(Of Byte, Byte)))

then it compiles - but you can also get rid of CType entirely:

.Select(Function(x) CByte(10))

(That simplification works in the C# code too, where this:

.Select<byte, byte>((Func<byte, byte>) (x => (byte) 10))

can be simplified to:

.Select(x => (byte) 10)

answered Aug 11, 2017 at 11:33

Jon Skeet

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