Stream.CanWrite Property
.NET Framework (current version)
When overridden in a derived class, gets a value indicating whether the current stream supports writing.
Assembly: mscorlib (in mscorlib.dll)
If a class derived from Stream does not support writing, a call to Write, BeginWrite, or WriteByte throws a NotSupportedException.
If the stream is closed, this property returns false.
The following is an example of using the CanWrite property.
using System; using System.IO; class TestRW { public static void Main(String[] args) { FileStream fs = new FileStream("MyFile.txt", FileMode.OpenOrCreate, FileAccess.Write); if (fs.CanRead && fs.CanWrite) { Console.WriteLine("MyFile.txt can be both written to and read from."); } else if (fs.CanWrite) { Console.WriteLine("MyFile.txt is writable."); } } } //This code outputs "MyFile.txt is 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.
Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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