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Version: 5

Categories

  • User Program Communication
    • Write to Console
    • Commenting
    • User Input
    • Read from File
    • Write to File
    • Namespace
  • Variables
    • Primitive Data Types
    • Variable Declaration
    • Parse
    • Constants
    • Pointers and References
    • Arrays
    • Lists
    • Dictionaries
    • Type Conversion
    • Structures
  • Control Flow
    • If Statement
    • Switch Case
    • For Loop
    • For Each
    • While Loop
    • Do While Loop
    • Try Catch Block
  • Object Oriented Programming
    • Class Declaration and Structure
    • Access Modifiers
    • Class Variables
    • Standard Methods
    • Static Methods
    • Constructor
    • Instantiation
    • Interfaces
    • Abstract Methods and Classes
    • Inheritance
  • Strings
    • String Variables
    • String Length
    • String Compare
    • String Trim
    • String Split
    • String Representation

User Program Communication

Write to File in C#

Used to write to a file.


Syntax
///declare an array of strings first, each array element being a file line
string[] fileLines = { }; ///lines in here

File.WriteAllLines("filename", fileLines);

Notes

The File class is within the System.IO namespace.

A StreamWriter can be used to write one line at a time and call the WriteLine() method.


Example
string[] grades = {"Student 1: 85", "Student 2: 60", "Student 3: 75"};

File.WriteAllLines("grades.txt", grades);

See Also
Documentation

How to: Write to a Text File (C# Programming Guide) - MSDN

Add to Slack

< Read from File   |   Namespace >


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