java.io.File.isDirectory C# (CSharp) Method

        public virtual bool isDirectory()
        {
            global::net.sf.jni4net.jni.JNIEnv @__env = this.Env;
            using(new global::net.sf.jni4net.jni.LocalFrame(@__env, 10)){
            return ((bool)(@__env.CallBooleanMethod(this, global::java.io.File.j4n_isDirectory23)));
            }
        }

 public virtual bool accept(File dir)
 {
   if (dir.isDirectory() && this.acceptsDirectories())
     return true;
   for (int index = 0; index < this.fileext.Length; ++index)
   {
     if (String.instancehelper_endsWith(dir.getName(), this.fileext[index]))
       return true;
   }
   return false;
 }