C# StreamReader ReadToEnd Example (Read Entire File)This C# example page uses the ReadToEnd method on the StreamReader to read an entire text file into a string.
StreamReader, ReadToEnd. Sometimes we want to read in a file line-by-line, but other times we just want the entire file at once. The ReadToEnd method on StreamReader is helpful here.
With this method,
we consume the entire file into a string in one line. This is similar in operation to File.ReadAllText. But StreamReader requires some surrounding code.File.ReadAllText
An example. Here is the ReadToEnd method. We can call it inside a using-statement for best effect. Please change the file path before you run this program on your system.
C# program that uses StreamReader ReadToEnd
static void Main()
using (StreamReader reader = new StreamReader(@"C:\programs\file.txt"))
// Read entire text file with ReadToEnd.
string contents = reader.ReadToEnd();
Which methods are best? If you already have a StreamReader, then using ReadToEnd is probably the best solution to read an entire text file into a string.
However: In other programs, where no StreamReader object exists, File.ReadAllText is probably a clearer method to use.
With ReadToEndAsync on StreamReader, we can achieve a significant performance boost. But this only helps when a lot of CPU usage is present during processing.StreamReader ReadToEndAsync
A summary. ReadToEnd is important enough that it deserves special attention. I have used it recently in a program—sometimes it leads to clearer code than ReadLine and while-loops would.
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