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C# Program to Demonstrate the Use of CanWrite Property

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  • Last Updated : 28 Mar, 2022
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FileStream class is used to perform read and write operations in a file. It provides full support for both synchronous and asynchronous read and write operations. This class provides different types of methods and properties and the CanWrite property is one of them. This property is used to check whether the given stream support writing or not. It will return true if the stream support writing, otherwise it will return false.

Syntax:

public override bool CanWrite { get; }

Return: The return type of this property is boolean. It will return true if the stream support writing. Or it will return false if the stream is closed or open with read-only access.

Approach:

1. Create two file pointers – file1 and file2

FileStream file1;
FileStream file2;

2. Get the file1 with sravan.txt with Read access and vignan.txt with Write access

file1 = new FileStream("sravan.txt", FileMode.Open, FileAccess.Read);
file2 = new FileStream("vignan.txt", FileMode.Open, FileAccess.Write);

Here, Open property is used to open the file, Read property is used to read the file, and Write property is used to write in the file.

3. Check the both files are able to Read or not using CanWrite Property

if (file1.CanWrite)
    Console.WriteLine("able to write");
else
    Console.WriteLine("not able to write");
if (file2.CanWrite)
    Console.WriteLine("able to write");
else
    Console.WriteLine("not able to write");

4. Close both the files

Example:

C#




// C# program to demonstrate the working of
// CanWrite property
using System;
using System.IO;
 
class GFG{
     
static void Main()
{
     
    // Declare two file pointers
    FileStream file1;
    FileStream file2;
     
    // Read files
    file1 = new FileStream("sravan.txt", FileMode.Open,
                                         FileAccess.Read);
                                          
    file2 = new FileStream("vignan.txt", FileMode.Open,
                                         FileAccess.Write);
                                          
    // Check file pointer 1 is able to write or not
    // Using CanWrite property
    if (file1.CanWrite)
        Console.WriteLine("able to write");
    else
        Console.WriteLine("not able to write");
         
    // Close first file pointer
    file1.Close();
     
    // Check file pointer 2 is able to write or not
    // Using CanWrite property
    if (file2.CanWrite)
        Console.WriteLine("able to write");
    else
        Console.WriteLine("not able to write");
         
    // Close second file pointer
    file2.Close();
}
}


Output:

not able to write
able to write

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