diff --git a/src/Renci.SshNet/Common/SshData.cs b/src/Renci.SshNet/Common/SshData.cs
index e593e35a..0002845d 100644
--- a/src/Renci.SshNet/Common/SshData.cs
+++ b/src/Renci.SshNet/Common/SshData.cs
@@ -4,7 +4,6 @@ using System.Collections.Generic;
 using System.Linq;
 #endif
 using System.Text;
-using System.Globalization;
 
 namespace Renci.SshNet.Common
 {
diff --git a/src/Renci.SshNet/IClientAuthentication.cs b/src/Renci.SshNet/IClientAuthentication.cs
index baadd806..af7586cb 100644
--- a/src/Renci.SshNet/IClientAuthentication.cs
+++ b/src/Renci.SshNet/IClientAuthentication.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace Renci.SshNet
+namespace Renci.SshNet
 {
     internal interface IClientAuthentication
     {
diff --git a/src/Renci.SshNet/ServiceFactory.cs b/src/Renci.SshNet/ServiceFactory.cs
index 6f0b7dc6..1c140655 100644
--- a/src/Renci.SshNet/ServiceFactory.cs
+++ b/src/Renci.SshNet/ServiceFactory.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Security.Cryptography;
 using System.Text;
 using Renci.SshNet.Common;
 using Renci.SshNet.Messages.Transport;
diff --git a/src/Renci.SshNet/Sftp/SftpFileAttributes.cs b/src/Renci.SshNet/Sftp/SftpFileAttributes.cs
index 29f540d6..de4b0293 100644
--- a/src/Renci.SshNet/Sftp/SftpFileAttributes.cs
+++ b/src/Renci.SshNet/Sftp/SftpFileAttributes.cs
@@ -1,9 +1,7 @@
 using System;
 using System.Collections.Generic;
-using System.IO;
 using System.Linq;
 using System.Globalization;
-using System.Text;
 using Renci.SshNet.Common;
 
 namespace Renci.SshNet.Sftp
diff --git a/src/Renci.SshNet/Sftp/SftpFileSystemInformation.cs b/src/Renci.SshNet/Sftp/SftpFileSystemInformation.cs
index 91fe04dd..8da62ff0 100644
--- a/src/Renci.SshNet/Sftp/SftpFileSystemInformation.cs
+++ b/src/Renci.SshNet/Sftp/SftpFileSystemInformation.cs
@@ -1,6 +1,4 @@
-using Renci.SshNet.Common;
-
-namespace Renci.SshNet.Sftp
+namespace Renci.SshNet.Sftp
 {
     /// <summary>
     /// Contains File system information exposed by statvfs@openssh.com request.