Steps for Resource File in Windows application

Get the Executing assembly

Assembly executingAssembly = Assembly.GetExecutingAssembly()

Path of executing assembly

string assemblyLocation = executingAssembly.Location;

string dirName = Path.GetDirectoryName(assemblyLocation);

Get the path of UI assembly

Assembly UIassembly = Assembly.LoadFile(Path.Combine(dirName, "dllname"));

Initialize the Resource Manager

ResourceManager = new ResourceManager(@"resourcename", UIassembly);