What is .Resx file in Dot Net? Interview question

What is .Resx file in Dot Net??

It is an XML based file, with key value pair.

Reading from .Resx File:

You can access the .Resx file using this code:

ResXResourceReader reader = new ResXResourceReader(Server.MapPath("test.resx"));
IDictionaryEnumerator rsxr = reader.GetEnumerator();
foreach (DictionaryEntry d in reader)
{
Console.WriteLine(d.Key.ToString() + ":\t" + d.Value.ToString());
}
//Close the reader.
reader.Close();

Writing to .Resx File:

We can write the binary data of an image to the .Resx file using the following code

Image img = Image.FromFile("urdu.jpg");
ResXResourceWriter rsxw = new ResXResourceWriter("urdu.resx");
rsxw.AddResource("urdu.jpg",img);
rsxw.Close();

Use of .Resx File:

It is very useful while working on Localized project [Multiple Languages], You can make different resource files for different languages and depending upon the user choice you can change the Language of the application.