Please use AddHandler statements when converting C# event handlers to VB text...

For example, instead of converting a C# handler to this...

queue.QueueItemAvailable += Me.ContinueAt

do this...

AddHandler queue.QueueItemAvailable, Addressof Me.ContinueAt

Using an IEnumerable collection and returning that instead

In my example below, none of the ViewState, Session or Request Params (arrays) have their round brackets converted to square brackets.

Example:
Protected Property CurrentSortColumn() As String
Get
If (ViewState("SortColumn") <> Nothing) Then
Return ViewState("SortColumn").ToString()
Else
ViewState("SortColumn") = "ADD_BOOK_ID"
Return "ADD_BOOK_ID"
End If
End Get

Set(ByVal value As String)
ViewState("SortColumn") = value
End Set

End Property

Private Sub Test

ParentControlID = Request.Params("ParentCtlID")

If DirectCast(Session("USER_TOKEN"), Int32) > 0 Then
UserCanEditAddBook = True
End If

End Sub

The converter could suggest the code needed to bind an event handler.

Example:

Private Sub SomeObject_SomeEvent(Arguments as Object) Handles SomeObject.SomeEvent

The following code could be suggested (in a comment):
SomeObject.SomeEvent += SomeObject_SomeEvent;

I had a bit of an issue with a StringDictionary collection when converting.

Original Code: (VB)
sServiceName = Me.Context.Parameters.Item("name")
sServiceDescription = Me.Context.Parameters.Item("description")
sServiceDisplayName = Me.Context.Parameters.Item("displayname")

Converted Code: (C#)
sServiceName = this.Context.Parameters.Item("name");
sServiceDescription = this.Context.Parameters.Item("description");
sServiceDisplayName = this.Context.Parameters.Item("displayname");

Correct Code: (C#)
sServiceName = this.Context.Parameters["name"];
sServiceDescription = this.Context.Parameters["description"];
sServiceDisplayName = this.Context.Parameters["displayname"];

In C#, Array.Item(key) is not valid. It should be Array[key].

Trying to use code converter gives "processing" without results, no matter how much you wait.

The syntax in VB is

returnValue = inputValue.Trim

When converting to C# it is not adding the "()" to the end of "Trim"

If button.InvokeRequired Then
Dim o As Object = scriptableButton.Invoke(New System.Windows.Forms.MethodInvoker(UserInterfaceCode))
End If

Should be

If button.InvokeRequired Then
Dim o As Object = scriptableButton.Invoke(New System.Windows.Forms.MethodInvoker(addressof UserInterfaceCode))
End If

foreach (var w in res1) Console.WriteLine(" ");

Converts incorrectly to VB as:

For Each w As var In res1
Console.WriteLine(" ")
Next

Which comes up invalid

In C#:
StringFormat sfCenter = new StringFormat() {Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center };

Converted to VB.NET:
sfCenter As New StringFormat()

Expected result:
sfCenter As New StringFormat() With {.Alignment = StringAlignment.Center, .LineAlignment = StringAlignment.Center}

When trying to convert from VB.Net to C# (or vice versa), if you have a nullable property that is created using the ? and not Nullable<> the post back on your page is not ready correctly.

Public Property CurrentDate As DateTime?

I should be able to pass that and get

public DateTime? CurrentDate { get; set; }

c# code

var textBox = new RibbonTextBox() { Label = "Label", Text = "Text", TextBoxWidth = 150 };

incorrectly converted to vb.net as

Dim textBox = New RibbonTextBox() With { _
Key .Label = "Label", _
Key .Text = "Text", _
Key .TextBoxWidth = 150 _
}

where "Key" is not needed, should be:

Dim textBox = New RibbonTextBox() With {.Label = "Label", .Text = "Text", .TextBoxWidth = 150}

Just realised (and also learned) that there's a small error when converting VB's Strings.Join into C# code.
The VB code:

Dim message As String = Join(anArrayList.ToArray, ",");

converts in C# to:

string message = Strings.Join(anArrayList.ToArray(), ",");

where it should be:

string message = String.Join(",", anArrayList.ToArray());

'VB
Dim a As New TimeSpan(1000L)
Dim b As New TimeSpan(2000L)
Dim d As Double = a.Ticks / b.Ticks 'd = 0.5

//Converted to C#
TimeSpan a = new TimeSpan(1000L);
TimeSpan b = new TimeSpan(2000L);
double d = a.Ticks / b.Ticks 'd = 0

When converting the following from C# to VB.NET it fails to convert correctly.
int i=5;
int j=i++;
//i=6 and j=5
It sets Dim j = System.Math.Max(System.Threading.Interlocked.Increment(i),i-1)

Not possible for i-1 to be greater than i+1

I am not able to convert C# code to Python..

I have c# code:
<%: Html.DropDownList("ArtistId", new SelectList(ViewData["Artists"] as IEnumerable, "ArtistId", "Name", Model.ArtistId))%>

many asp.net mvc c# code can not convert to vb

Is there a way to post code to be converted via a URL instead of the site's web form? I can easily create a javascript bookmarklet in my browser to accept my code to be converted (via clipboard or current selection), so it would be nice to be able to submit that to the conversion site via a URL without having to first open a new browser window to the conversion site's web form. Great tool--use it frequently!