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File.Create Method (String, Int32)

Creates or overwrites the specified file.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)
public static FileStream Create(
	string path,
	int bufferSize
)

Parameters

path
Type: System.String

The name of the file.

bufferSize
Type: System.Int32

The number of bytes buffered for reads and writes to the file.

Return Value

Type: System.IO.FileStream
A FileStream with the specified buffer size that provides read/write access to the file specified in path.
ExceptionCondition
UnauthorizedAccessException

The caller does not have the required permission.

-or-

path specified a file that is read-only.

ArgumentException

path is a zero-length string, contains only white space, or contains one or more invalid characters as defined by InvalidPathChars.

ArgumentNullException

path is null.

PathTooLongException

The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters.

DirectoryNotFoundException

The specified path is invalid (for example, it is on an unmapped drive).

IOException

An I/O error occurred while creating the file.

NotSupportedException

path is in an invalid format.

The FileStream object created by this method has a default FileShare value of None; no other process or code can access the created file until the original file handle is closed.

The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory. To obtain the current working directory, see GetCurrentDirectory.

This method is equivalent to the FileStream(String, FileMode, FileAccess, FileShare, Int32) constructor overload. If the specified file does not exist, it is created; if it does exist and it is not read-only, the contents are overwritten.

By default, full read/write access to new files is granted to all users. The file is opened with read/write access and must be closed before it can be opened by another application.

For a list of common I/O tasks, see Common I/O Tasks.

The following example creates a file with the specified buffer size.

using System;
using System.IO;
using System.Text;

class Test 
{
    public static void Main() 
    {
        string path = @"c:\temp\MyTest.txt";

        // Delete the file if it exists. 
        if (File.Exists(path)) 
        {
            File.Delete(path);
        }

        // Create the file. 
        using (FileStream fs = File.Create(path, 1024)) 
        {
            Byte[] info = new UTF8Encoding(true).GetBytes("This is some text in the file.");
            // Add some information to the file.
            fs.Write(info, 0, info.Length);
        }

        // Open the stream and read it back. 
        using (StreamReader sr = File.OpenText(path)) 
        {
            string s = "";
            while ((s = sr.ReadLine()) != null) 
            {
                Console.WriteLine(s);
            }
        }
    }
}
  • FileIOPermission 

    for permission to read and write to the file described by the path parameter. Associated enumerations: Read , Write

    Security action: Demand.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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