CanRead Property

FileStream.CanRead Property


Gets a value indicating whether the current stream supports reading.

Namespace:   System.IO
Assembly:  mscorlib (in mscorlib.dll)

public override bool CanRead { get; }

Property Value

Type: System.Boolean

true if the stream supports reading; false if the stream is closed or was opened with write-only access.

If a class derived from Stream does not support reading, calls to the Read, ReadByte, and BeginRead methods throw a NotSupportedException.

If the stream is closed, this property returns false.

The following example demonstrates a use of the CanRead property. The output of this code is "MyFile.txt is not writable." To get the output message "MyFile.txt can be both written to and read from.", change the FileAccess parameter to ReadWrite in the FileStream constructor.

using System;
using System.IO;

class TestRW 
    public static void Main(String[] args)
        FileStream fs = new FileStream("MyFile.txt", FileMode.OpenOrCreate, FileAccess.Read);
        if (fs.CanRead && fs.CanWrite)
            Console.WriteLine("MyFile.txt can be both written to and read from.");
        else if (fs.CanRead)
            Console.WriteLine("MyFile.txt is not writable.");

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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