Query Operator First

Let's say you have the following method that returns a FileInfo object from an array if the Name property equals a certain value:

public static FileInfo FindFile(FileInfo[] fileInfoArray, string name)

{           

    foreach (FileInfo fi in fileInfoArray)

    {

        if (fi.Name == name)

            return fi;

    }

    return null;

}

You can replace this method with a call to the query operator First :

FileInfo fileInfo = fileInfoArray.First(fi => fi.Name =="myFileName.txt");

Since the query operator First returns a single value, it forces immediate query evaluation.