void Remove(
    Func<int, bool> predicate
)

Sub Remove(
    predicate As Func(Of Integer, Boolean)
)

workbook.LoadDocument("Documents\\Document.xlsx");
Worksheet worksheet = workbook.Worksheets[0];
// Create a function specifying the condition to remove worksheet columns.
Func<int, bool> columnRemovalCondition = x => worksheet.Cells[0, x].Value.NumericValue > 3.0 && worksheet.Cells[0, x].Value.NumericValue < 14.0;

// Fill cells with data.
for (int i = 0; i < 15; i++)
{
    worksheet.Cells[i, 0].Value = i + 1;
    worksheet.Cells[0, i].Value = i + 1;
}

// Delete all columns that meet the specified condition.
//worksheet.Columns.Remove(columnRemovalCondition);

// Delete columns that meet the specified condition starting from the 7th column.
worksheet.Columns.Remove(7, columnRemovalCondition);

// Delete columns that meet the specified condition starting from the 5th column to the 14th column.
//worksheet.Columns.Remove(5, 14, columnRemovalCondition);

workbook.LoadDocument("Documents\Document.xlsx")
Dim worksheet As Worksheet = workbook.Worksheets(0)
' Create a function specifying the condition to remove worksheet columns.
Dim columnRemovalCondition As Func(Of Integer, Boolean) = Function(x) worksheet.Cells(0, x).Value.NumericValue > 3.0 AndAlso worksheet.Cells(0, x).Value.NumericValue < 14.0

' Fill cells with data.
For i As Integer = 0 To 14
    worksheet.Cells(i, 0).Value = i + 1
    worksheet.Cells(0, i).Value = i + 1
Next i

' Delete all columns that meet the specified condition.
'worksheet.Columns.Remove(columnRemovalCondition);

' Delete columns that meet the specified condition starting from the 7th column.
worksheet.Columns.Remove(7, columnRemovalCondition)

' Delete columns that meet the specified condition starting from the 5th column to the 14th column.
'worksheet.Columns.Remove(5, 14, columnRemovalCondition);