VB.Net/C# - How to add a single file to a ZIP with SharpZipLib

Here is a shared/static function (provided in Visual Basic and C#) that will add a single file into a ZIP file using SharpZipLib. Portions of this code originated from StackExchange, I melded what I saw into a single function.

VB.Net

''' <summary>
''' Adds a single file to a ZIP library using SharpZipLib
''' </summary>
''' <param name="zipFile">The path to the zip file you want to add a file to.</param>
''' <param name="fileToAdd">The path to the file you want to add to the zip.</param>
''' <param name="compressionLevel">The compression level to use from 0 to 10</param>
Public Shared Sub AddFileToZip(zipFile As String, fileToAdd As String, compressionLevel As Integer)
    Using zipStream As New ICSharpCode.SharpZipLib.Zip.ZipOutputStream(File.Create(zipFile))
        zipStream.SetLevel(compressionLevel)

        Dim buffer As Byte() = New Byte(4095) {}
        Dim entry As New ICSharpCode.SharpZipLib.Zip.ZipEntry(System.IO.Path.GetFileName(fileToAdd))

        entry.DateTime = DateTime.Now
        zipStream.PutNextEntry(entry)

        Using fs As FileStream = File.OpenRead(fileToAdd)
            Dim sourceBytes As Integer
            Do
                sourceBytes = fs.Read(buffer, 0, buffer.Length)
                zipStream.Write(buffer, 0, sourceBytes)
            Loop While sourceBytes > 0
        End Using

        zipStream.Finish() : zipStream.Close() : zipStream.Dispose()
    End Using

End Sub

C#

    /// <summary>
    /// Adds a single file to a ZIP library using SharpZipLib
    /// </summary>
    /// <param name="zipFile">The path to the zip file you want to add a file to.</param>
    /// <param name="fileToAdd">The path to the file you want to add to the zip.</param>
    /// <param name="compressionLevel">The compression level to use from 0 to 10</param>
    /// <remarks></remarks>
    public static void AddFileToZip(string zipFile, string fileToAdd, int compressionLevel)
    {
        using (ICSharpCode.SharpZipLib.Zip.ZipOutputStream zipStream = new ICSharpCode.SharpZipLib.Zip.ZipOutputStream(File.Create(zipFile)))
        {	
            zipStream.SetLevel(compressionLevel);
    	    byte[] buffer = new byte[4096];
            ICSharpCode.SharpZipLib.Zip.ZipEntry entry = new ICSharpCode.SharpZipLib.Zip.ZipEntry(System.IO.Path.GetFileName(fileToAdd));
    	    entry.DateTime = DateTime.Now;
            zipStream.PutNextEntry(entry);
    	    using (FileStream fs = File.OpenRead(fileToAdd))
            {		
                int sourceBytes = 0;		
                do
                {			
                    sourceBytes = fs.Read(buffer, 0, buffer.Length);
                	zipStream.Write(buffer, 0, sourceBytes);
                            		
                } 
                while (sourceBytes > 0);	
            }

            zipStream.Finish();	
            zipStream.Close();	
            zipStream.Dispose();
        }    
    }