当调用EventLog.SourceExists("source1")时，抛出一下异常

System.Security.SecurityException was unhandled
  HResult=-2146233078
  Message=The source was not found, but some or all event logs could not be searched.  Inaccessible logs: Security.
  Source=System
  StackTrace:
       at System.Diagnostics.EventLog.FindSourceRegistration(String source, String machineName, Boolean readOnly, Boolean wantToCreate)
       at System.Diagnostics.EventLog.SourceExists(String source, String machineName, Boolean wantToCreate)
       at System.Diagnostics.EventLog.SourceExists(String source)
       at EventLogApp.Program.Main(String[] args) in E:\MyWorkspace\Projects\Tuturial\CSharpStudy\EventLogApp\Program.cs:line 14
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException:

解决方案：

右键点击要运行的文件，执行“run as administrator‘