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File.Create Method (String)

.NET Framework 1.1

Creates a file in the specified path.

[Visual Basic]
Overloads Public Shared Function Create( _
   ByVal path As String _
) As FileStream
public static FileStream Create(
 string path
public: static FileStream* Create(
 String* path
public static function Create(
   path : String
) : FileStream;


The path and name of the file to create.

Return Value

A FileStream that provides read/write access to the specified file.


Exception Type Condition
UnauthorizedAccessException The caller does not have the required permission.


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 a null reference (Nothing in Visual Basic).
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, such as being on an unmapped drive.
IOException An I/O error occurred while creating the file.
NotSupportedException path is in an invalid format.


This method is equivalent to Create(String, Int32) using the default buffer size.

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.

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 an example of using this method, see the Example section below. The following table lists examples of other typical or related I/O tasks.

To do this... See the example in this topic...
Create a text file. Writing Text to a File
Write to a text file. Writing Text to a File
Read from a text file. Reading Text from a File
Append text to a file. Opening and Appending to a Log File



Copy a file. File.Copy


Rename or move a file. File.Move


Delete a file. File.Delete


Read from a binary file. Reading and Writing to a Newly Created Data File
Write to a binary file. Reading and Writing to a Newly Created Data File
Create a directory. CreateDirectory



[Visual Basic, C#, C++] The following example creates a file in the specified path, writes some information to the file, and reads from the file.

[Visual Basic] 
Imports System
Imports System.IO
Imports System.Text

Public Class Test
    Public Shared Sub Main()
        Dim path As String = "c:\temp\MyTest.txt"

        ' Delete the file if it exists.
        If File.Exists(path) Then
        End If

        ' Create the file.
        Dim fs As FileStream = File.Create(path)
        Dim info As Byte() = 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.
        Dim sr As StreamReader = File.OpenText(path)
        Do While sr.Peek() >= 0
    End Sub
End Class

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)) 

        // Create the file.
        using (FileStream fs = File.Create(path)) 
            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) 

#using <mscorlib.dll>

using namespace System;
using namespace System::IO;
using namespace System::Text;

int main() {
    String* path = S"c:\\temp\\MyTest.txt";

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

    // Create the file.
    FileStream* fs = File::Create(path);
    try {
        Byte info[] = (new UTF8Encoding(true))->GetBytes(S"This is some text in the file.");
        // Add some information to the file.
        fs->Write(info, 0, info->Length);
    } __finally {
        if (fs) __try_cast<IDisposable*>(fs)->Dispose();

    // Open the stream and read it back.
    StreamReader* sr = File::OpenText(path);
    try {
        String* s = S"";
        while (s = sr->ReadLine()) {
    } __finally {
        if (sr) __try_cast<IDisposable*>(sr)->Dispose();

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard

.NET Framework Security: 

See Also

File Class | File Members | System.IO Namespace | File.Create Overload List | Working with I/O | Reading Text from a File | Writing Text to a File | Basic File I/O | Reading and Writing to a Newly Created Data File