File is not able to read

I am trying to read data from text file. But i can't able to read data from text file. Near by stream i am getting null. I used below code

var assembly = typeof(LoadResourceText).GetTypeInfo().Assembly;
Stream stream = assembly.GetManifestResourceStream(/mnt/sdcard/Android/data/AndroidApp7.AndroidApp7/files/DATA.txt);
string text = "";
using (var reader = new System.IO.StreamReader(stream))
{
text = reader.ReadToEnd();
}