update using

Author: liangchaoboy

examples/FetchDemo.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using Qiniu.Conf;
 using Qiniu.RS;
 using Qiniu.RPC;

examples/ListDemo.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using Qiniu.Conf;
 using Qiniu.RS;
 using Qiniu.RPC;

examples/copy.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Qiniu.RS;
 using Qiniu.RPC;

examples/delete.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Qiniu.RS;
 using Qiniu.RPC;

examples/download.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Qiniu.RS;
 

examples/fops.cs

@@ -1,8 +1,6 @@
 using Qiniu.RS;
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 
 namespace ConsoleDemo

examples/move.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Qiniu.RS;
 using Qiniu.RPC;

examples/stat.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Qiniu.RS;
 using Qiniu.RPC;

examples/upload_callback.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Qiniu.Auth;
 using Qiniu.IO;

examples/upload_overwrite.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Qiniu.Auth;
 using Qiniu.IO;