1.Imerge下载地址：https://www.microsoft.com/en-us/download/details.aspx?id=17630
2.场景：C盘有2个dll，分别为: C:\A.dll ,C:\B.dll 合并为C:\C.dll
3.ILMerge安装到C盘的路径为：C:\Program Files (x86)\Microsoft\ILMerge
运行cmd：
(1)cd C:\Program Files (x86)\Microsoft\ILMerge
(2)ILmerge /ndebug /target:dll /out:C:\C.dll /log C:\A.dll C:\B.dll
out:C.dll:是输出文件; A.dll，B.dll 是源文件，多个源文件用空格隔开。
例：
ILmerge /ndebug /target:library /targetplatform:v2 /out:E:\Lbb.Work\Lbb.Cx\Common.ExtendLibrary\lib\Common.ExtendLibrary.dll /log E:\Lbb.Work\Lbb.Cx\Common.ExtendLibrary\bin\Debug\Common.ExtendLibrary.dll E:\Lbb.Work\Lbb.Cx\Common.ExtendLibrary\bin\Debug\Newtonsoft.Json.dll /wildcards
Imerge界面化管理工具下载地址：http://ilmergegui.codeplex.com/releases/view/617003