提权

1，新增app.manifest

 ——————————————————————————————————————

<?xml version="1.0" encoding="utf-8"?>
<asmv1:assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1" xmlns:asmv1="urn:schemas-microsoft-com:asm.v1" xmlns:asmv2="urn:schemas-microsoft-com:asm.v2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<assemblyIdentity version="1.0.0.0" name="MyApplication.app"/>
<trustInfo xmlns="urn:schemas-microsoft-com:asm.v2">
<security>
<requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3">
<!-- UAC 清单选项
如果要更改 Windows 用户帐户控制级别，请用以下节点之一替换 
requestedExecutionLevel 节点。

<requestedExecutionLevel level="asInvoker" uiAccess="false" />
<requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
<requestedExecutionLevel level="highestAvailable" uiAccess="false" />

指定 requestedExecutionLevel 节点将会禁用文件和注册表虚拟化。
如果要利用文件和注册表虚拟化实现向后 
兼容性，则删除 requestedExecutionLevel 节点。
-->
<requestedExecutionLevel level="asInvoker" uiAccess="false" />
</requestedPrivileges>
</security>
</trustInfo>

<compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
<application>
<!-- 此应用程序设计使用的所有 Windows 版本的列表。
Windows 将会自动选择最兼容的环境。-->

<!-- 如果应用程序设计为使用 Windows Vista，请取消注释以下 supportedOS 节点-->
<!--<supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"></supportedOS>-->

<!-- 如果应用程序设计使用 Windows 7，请取消注释以下 supportedOS 节点-->
<!--<supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>-->

<!-- 如果应用程序设计为使用 Windows 8，请取消注释以下 supportedOS 节点-->
<!--<supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"></supportedOS>-->

</application>
</compatibility>

<!-- 启用 Windows 公共控件和对话框的主题(Windows XP 和更高版本) -->
<!-- <dependency>
<dependentAssembly>
<assemblyIdentity
type="win32"
name="Microsoft.Windows.Common-Controls"
version="6.0.0.0"
processorArchitecture="*"
publicKeyToken="6595b64144ccf1df"
language="*"
/>
</dependentAssembly>
</dependency>-->

</asmv1:assembly>

-------------修改为--------------------------

<?xml version="1.0" encoding="utf-8"?>
<asmv1:assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1"
xmlns:asmv1="urn:schemas-microsoft-com:asm.v1" xmlns:asmv2="urn:schemas-microsoft-com:asm.v2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<assemblyIdentity version="1.0.0.0" name="MyApplication.app"/>
<trustInfo xmlns="urn:schemas-microsoft-com:asm.v2">
<security>
<requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3">
<!-- UAC Manifest Options
If you want to change the Windows User Account Control level replace the
requestedExecutionLevel node with one of the following.
<requestedExecutionLevel level="asInvoker" uiAccess="false" />
<requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
<requestedExecutionLevel level="highestAvailable" uiAccess="false" />
If you want to utilize File and Registry Virtualization for backward
compatibility then delete the requestedExecutionLevel node.
-->
<requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
</requestedPrivileges>
</security>
</trustInfo>
</asmv1:assembly>

2，//提权

DirectoryInfo dirinfo = new DirectoryInfo(string.Format(@"{0}\System32\drivers\etc\hosts", GetOS().SystemRoot));

DirectorySecurity dirsecurity = dirinfo.GetAccessControl();

dirsecurity.AddAccessRule(new FileSystemAccessRule("Administrators", FileSystemRights.FullControl, InheritanceFlags.None, PropagationFlags.InheritOnly, AccessControlType.Allow)); dirinfo.SetAccessControl(dirsecurity);