C# code to read file size

Length what can be heavy for mass operation. Length is how the doc refers to the property, even though it is not static. The answer is relative to the code in question. Consider how one typically does a "mass operation" - via the directory info GetFiles ; A collection of FileInfo s is created for you. Getting Length of all those files is lightweight. ToolmakerSteve: MS docs is well-known rubbish, don't refer it as a "normal way".

Newbies will be confused when they see call to static method and obviously it doesn't exist. GetFiles is only one of ways to get list of files. Names could be autogenerated like "pic GetLength string fileName. It's WAY more convenient and suits to many casual tasks. Viincent - "Names could be autogenerated like "pic Extract the directory path of all the file paths, into a HashSet. I'd love to know about a static method that gives Length of file.

What environment are you in, that has FileInfo. Neither Google nor Intellisense is giving me a hit for any static member, on either File or FileInfo , that gives file length. Austin Salonen Austin Salonen 47k 15 15 gold badges silver badges bronze badges. WriteLine info. Ferrell S. Ferrell 2 2 silver badges 7 7 bronze badges. It returns the file contents length. Thomas Levesque Thomas Levesque k 62 62 gold badges silver badges bronze badges. Name; Console.

FullName; Console. Extension; Console. DirectoryName; Console. Exists; Console. IsReadOnly; Console. CreationTime; Console. LastAccessTime; Console. LastWriteTime; Console. View All. How to get a file size in C. Mahesh Chand Updated date Jun 16, The Length property of the FileInfo class returns the size of a file in bytes. The DirectoryName property returns the name of the directory of a file.

The following code snippet returns the directory of a file. The Exists property returns true if a file exists. The following code snippet returns true if a file already exists.

The Length property returns the size of a file in bytes. The following code snippet returns the size of a file. The IsReadOnly property returns if a file is read only. The following code snippet returns true if a file is read only. The CreationTime property returns the DateTime when a file was creaed.

The following code snippet returns the creation time of a file. The following code snippet returns the last access time of a file. The following code snippet returns the last write time of a file. The FileInfo. Create method creates a file at the given path. If just a file name is provided without a path, the file will be created in the current folder. The following code snippet creates a file using the Create method that returns a FileSteam object.

The Write method of FileStream can be used to write text to the file. CreateText method creates and opens a file for writing UTF-8 encoded text. If file already exists, this method opens the file. The following code snippet creates a file using the CreateText method that returns a StreamWriter object. The WriteLine method of SteamLine can be used to add line text to the object and writes to the file.

A File must be opened using an IO resource before it can be read or write to. The FileInfo class provides four methods to open a file. The OpenRead method opens a file for reading. The method returns a FileStream object that is used to read a file using its Read method. The file is read into a byte array. The following code snippet uses the FileStream.