读写dll版本号

//方法一:
string version = System.Reflection.Assembly.LoadFrom(strFilePath).GetName().Version.ToString();
//方法二:
Version ApplicationVersion = new Version(Application.ProductVersion);
string version = ApplicationVersion.Major.ToString();//获取主版本号                  
//方法三:             
System.Diagnostics.FileVersionInfo info =System.Diagnostics.FileVersionInfo.GetVersionInfo(strFilePath);   
string version = info.FileVersion;