C#

  Dim cert_personal As X509Certificate2 = Nothing<br />
        Try<br />
            cert_personal = New X509Certificate2<br />
            cert_personal.Import(Application.StartupPath  & "\Chain\Personal.pfx","My Password" , (X509KeyStorageFlags.UserKeySet Or X509KeyStorageFlags.Exportable))<br />
        Catch ex As Exception<br />
            MsgBox(ex.Message)<br />
        End Try<br />
        If cert_personal Is Nothing Then<br />
            Return False<br />
        End If<br />
<br />
        ''XXXXXXXXXXXXXXXXXXXXXXXX PERSONAL XXXXXXXXXXXXXXXXXXXXXXXXXXXXX<br />
        Dim store As New X509Store(StoreName.My, StoreLocation.CurrentUser)<br />
        Try<br />
            store.Open(OpenFlags.ReadWrite)<br />
            Dim findVal As String = cert_personal.Thumbprint 'Thumbprint <br />
            Dim certColl As X509Certificate2Collection = store.Certificates.Find(X509FindType.FindByThumbprint, findVal, False)<br />
<br />
            If certColl.Count <= 0 Then<br />
                store.Add(cert_personal)<br />
            <br />
            End If<br />
        Catch ex As Exception<br />
            MsgBox(ex.Message)<br />
        Finally<br />
            store.Close()<br />
        End Try<br />
<br />

<br />
public void CompressFile(string inputFileName, string outputFileName)<br />
		{<br />
			byte[] buffer = new byte[4096];<br />
			if (File.Exists(inputFileName))<br />
			{<br />
				using (FileStream inputFile = File.Open(inputFileName, FileMode.Open), outputFile = File.Create(outputFileName))<br />
				{<br />
<br />
					using (GZipStream gzip = new GZipStream(outputFile, CompressionMode.Compress))<br />
					{<br />
						int n = 0;<br />
						while ((n = inputFile.Read(buffer, 0, buffer.Length)) != 0)<br />
						{<br />
							gzip.Write(buffer, 0, n);<br />
						}<br />
					}<br />
				}<br />
			}<br />
		}<br />
<br />
<br />
		public void UncompressFile(string inputFileName, string outputFileName)<br />
		{<br />
			byte[] buffer = new byte[4096];<br />
			if (File.Exists(inputFileName))<br />
			{<br />
				using (FileStream intputFile = File.Open(inputFileName, FileMode.Open), outputFile = File.Create(outputFileName))<br />
				{<br />
					using (GZipStream gzip = new GZipStream(intputFile, CompressionMode.Decompress))<br />
					{<br />
						int n;<br />
						while ((n = gzip.Read(buffer, 0, buffer.Length)) != 0)<br />
						{<br />
							outputFile.Write(buffer, 0, n);<br />
						}<br />
					}<br />
				}<br />
			}<br />
		}<br />