static void Main()
{
//Create a setup for sub domain
AppDomainSetup subDomainSetup = new AppDomainSetup();
subDomainSetup.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory;
//Set permissions that allows to create and write to file
//FileSizeOnDisc property also requires unrestricted PermissionState
PermissionSet permissionSet = new PermissionSet(PermissionState.Unrestricted);
SecurityPermission securityPermission = new SecurityPermission(SecurityPermissionFlag.Execution);
FileIOPermission fileIOPermission = new FileIOPermission(PermissionState.Unrestricted);
fileIOPermission.AllFiles = FileIOPermissionAccess.AllAccess;
permissionSet.AddPermission(securityPermission);
permissionSet.AddPermission(fileIOPermission);
//Create sub domain with defined setup and permission set
AppDomain subDomain = AppDomain.CreateDomain("PluginSubDomain", null, subDomainSetup, permissionSet);
//Define assembly and type name that want to execute
string assemblyName = "PluginApplication";
string typeName = "Contents.AppDomain_Sample.PluginApplication.FileOperationPlugin";
//Instantiate a new object which is defined in the sub domain assembly
IPluginService pluginService = (IPluginService)subDomain.CreateInstanceAndUnwrap(assemblyName, typeName);
#region SubDomain object implementation
pluginService.FilePath = @"C:\tmp\test.txt";
//Create file
pluginService.CreateFile();
Console.WriteLine($"> File Length: {pluginService.FileLength}");
Console.WriteLine($"> File Size on Disc: {pluginService.FileSizeOnDisc}"); //Requires unrestricted permission state
//Write to file
pluginService.WriteFile("Halit Yurtsever");
Console.WriteLine($"> File Length: {pluginService.FileLength}");
Console.WriteLine($"> File Size on Disc: {pluginService.FileSizeOnDisc}");
//Read file
string content;
pluginService.ReadFile(out content);
Console.WriteLine($"> File Content: {content}");
//Delete file
pluginService.DeleteFile();
#endregion
//Unload sub domain when finish your work
AppDomain.Unload(subDomain);
}