VB.net error after conversion from C#

Hi. I converted the C# code at the bottom to get the VB.net code below but the system
is showing a few errors. For instance in the row market ERROR I get the message
')' expected

    Public Function PivotData(RowField As String, DataField As String, Aggregate As AggregateFunction, ParamArray ColumnFields As String()) As DataTable
        Dim dt As New DataTable()
        Dim Separator As String = "."
      Dim RowList = (From x In _SourceTable.AsEnumerable()New With { _  'ERROR
            Key .Name = x.Field(Of Object)(RowField) _
      }).Distinct()



public DataTable PivotData(string RowField, string DataField,
       AggregateFunction Aggregate, params string[] ColumnFields)
{
    DataTable dt = new DataTable();
    string Separator = ".";
    var RowList = (from x in _SourceTable.AsEnumerable()
        select new { Name = x.Field<object>(RowField) }).Distinct();
    var ColList = (from x in _SourceTable.AsEnumerable()
                   select new { Name = ColumnFields.Select(n => x.Field<object>(n))
                       .Aggregate((a, b) => a += Separator + b.ToString()) })
                       .Distinct()
                       .OrderBy(m => m.Name);