security permissions for creating a file

[Mark]

Hello,

in a simple console application I try to create a file with some code like:

FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
FileAccess.Writ e);
StreamWriter sw = new StreamWriter(fi le);
sw.Write("Hello ");
sw.Close();
file.Close();

I will get an error System.Security .SecurityExcept ion

Are there only one way to avoid this and how this can be done?

Thanks and regards
Mark

[Nicholas Paldino [.NET/C# MVP]]

Mark,

You get this exception because you don't have rights to create or open
the file in the directory that it is set in. You need to try and create the
file in a directory that you have rights to, or, if the file exists, check
the rights on the file to make sure that you can open it for writing.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

Hello,

in a simple console application I try to create a file with some code
like:

FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
FileAccess.Writ e);
StreamWriter sw = new StreamWriter(fi le);
sw.Write("Hello ");
sw.Close();
file.Close();

I will get an error System.Security .SecurityExcept ion

Are there only one way to avoid this and how this can be done?

Thanks and regards
Mark

[Mark]

Hi Nicholas,

I tried a console application and as admin I have no restriction in any
directory.

regards Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb
im Newsbeitrag news:es******** ******@tk2msftn gp13.phx.gbl...

Mark,

You get this exception because you don't have rights to create or open
the file in the directory that it is set in. You need to try and create the file in a directory that you have rights to, or, if the file exists, check
the rights on the file to make sure that you can open it for writing.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

Hello,

in a simple console application I try to create a file with some code
like:

FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
FileAccess.Writ e);
StreamWriter sw = new StreamWriter(fi le);
sw.Write("Hello ");
sw.Close();
file.Close();

I will get an error System.Security .SecurityExcept ion

Are there only one way to avoid this and how this can be done?

Thanks and regards
Mark

[Nicholas Paldino [.NET/C# MVP]]

Are you sure that the security exception is for opening the file then?
Where is the application loaded from? Are you running it from a network
share, or the internet? If so, then the application is going to be granted
a limited permission set.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

Hi Nicholas,

I tried a console application and as admin I have no restriction in any
directory.

regards Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb
im Newsbeitrag news:es******** ******@tk2msftn gp13.phx.gbl...

Mark,

You get this exception because you don't have rights to create or
open
the file in the directory that it is set in. You need to try and create

the

file in a directory that you have rights to, or, if the file exists,
check
the rights on the file to make sure that you can open it for writing.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

> Hello,
>
> in a simple console application I try to create a file with some code
> like:
>
> FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
> FileAccess.Writ e);
> StreamWriter sw = new StreamWriter(fi le);
> sw.Write("Hello ");
> sw.Close();
> file.Close();
>
> I will get an error System.Security .SecurityExcept ion
>
> Are there only one way to avoid this and how this can be done?
>
> Thanks and regards
> Mark
>
>

[Ignacio Machin \( .NET/ C# MVP \)]

hi,

post the text of the exception.

cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

Hi Nicholas,

I tried a console application and as admin I have no restriction in any
directory.

regards Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb
im Newsbeitrag news:es******** ******@tk2msftn gp13.phx.gbl...

Mark,

You get this exception because you don't have rights to create or
open
the file in the directory that it is set in. You need to try and create

the

file in a directory that you have rights to, or, if the file exists,
check
the rights on the file to make sure that you can open it for writing.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

> Hello,
>
> in a simple console application I try to create a file with some code
> like:
>
> FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
> FileAccess.Writ e);
> StreamWriter sw = new StreamWriter(fi le);
> sw.Write("Hello ");
> sw.Close();
> file.Close();
>
> I will get an error System.Security .SecurityExcept ion
>
> Are there only one way to avoid this and how this can be done?
>
> Thanks and regards
> Mark
>
>

[Mark]

hi

Request for the permission of type
System.Security .Permissions.Fi leIOPermission, mscorlib, Version=1.0.500 0.0,
Culture=neutral , PublicKeyToken= b77a5c561934e08 9 failed.

regards
Mark
"Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us >
schrieb im Newsbeitrag news:ON******** ******@TK2MSFTN GP12.phx.gbl...

hi,

post the text of the exception.

cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

Hi Nicholas,

I tried a console application and as admin I have no restriction in any
directory.

regards Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb im Newsbeitrag news:es******** ******@tk2msftn gp13.phx.gbl...

Mark,

You get this exception because you don't have rights to create or
open
the file in the directory that it is set in. You need to try and

create the

file in a directory that you have rights to, or, if the file exists,
check
the rights on the file to make sure that you can open it for writing.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...
> Hello,
>
> in a simple console application I try to create a file with some code
> like:
>
> FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
> FileAccess.Writ e);
> StreamWriter sw = new StreamWriter(fi le);
> sw.Write("Hello ");
> sw.Close();
> file.Close();
>
> I will get an error System.Security .SecurityExcept ion
>
> Are there only one way to avoid this and how this can be done?
>
> Thanks and regards
> Mark
>
>

[Mark]

hi,

what I am trying:

1. I create a file x.cs with notepad nothing more than a main
public static void Main( string[] args )
{
try
{
FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
FileAccess.Writ e);
StreamWriter sw = new StreamWriter(fi le);
sw.Write("Hello ");
sw.Close();
file.Close();
}
catch( Exception ex )
{
Console.WriteLi ne( ex.Message );
};
}

2. built it with csc.exe x.cs and got a x.exe
3. executing x.exe on commandline (local dir, no shares, as admin, no
domain, simple way)
4. got exception - I guess .NET told me that this application is not safe
writing files.
Request for the permission of type
System.Security .Permissions.Fi leIOPermission, mscorlib, Version=1.0.500 0.0,
Culture=neutral , PublicKeyToken= b77a5c561934e08 9 failed.

regards
Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb
im Newsbeitrag news:e2******** ******@TK2MSFTN GP14.phx.gbl...

Are you sure that the security exception is for opening the file then?
Where is the application loaded from? Are you running it from a network
share, or the internet? If so, then the application is going to be granted a limited permission set.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

Hi Nicholas,

I tried a console application and as admin I have no restriction in any
directory.

regards Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb im Newsbeitrag news:es******** ******@tk2msftn gp13.phx.gbl...

Mark,

You get this exception because you don't have rights to create or
open
the file in the directory that it is set in. You need to try and

create the

file in a directory that you have rights to, or, if the file exists,
check
the rights on the file to make sure that you can open it for writing.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...
> Hello,
>
> in a simple console application I try to create a file with some code
> like:
>
> FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
> FileAccess.Writ e);
> StreamWriter sw = new StreamWriter(fi le);
> sw.Write("Hello ");
> sw.Close();
> file.Close();
>
> I will get an error System.Security .SecurityExcept ion
>
> Are there only one way to avoid this and how this can be done?
>
> Thanks and regards
> Mark
>
>

[Willy Denoyette [MVP]]

You loading the executable from a network share.
Programs that are loaded from a network are not trusted to access the local
file system, you have to grant "fulltrust" to the the share you are loading
this application from using caspol.exe.

Willy.
"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

hi,

what I am trying:

1. I create a file x.cs with notepad nothing more than a main
public static void Main( string[] args )
{
try
{
FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
FileAccess.Writ e);
StreamWriter sw = new StreamWriter(fi le);
sw.Write("Hello ");
sw.Close();
file.Close();
}
catch( Exception ex )
{
Console.WriteLi ne( ex.Message );
};
}

2. built it with csc.exe x.cs and got a x.exe
3. executing x.exe on commandline (local dir, no shares, as admin, no
domain, simple way)
4. got exception - I guess .NET told me that this application is not safe
writing files.
Request for the permission of type
System.Security .Permissions.Fi leIOPermission, mscorlib,
Version=1.0.500 0.0,
Culture=neutral , PublicKeyToken= b77a5c561934e08 9 failed.

regards
Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb
im Newsbeitrag news:e2******** ******@TK2MSFTN GP14.phx.gbl...

Are you sure that the security exception is for opening the file
then?
Where is the application loaded from? Are you running it from a network
share, or the internet? If so, then the application is going to be

granted

a limited permission set.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

> Hi Nicholas,
>
> I tried a console application and as admin I have no restriction in any
> directory.
>
> regards Mark
>
>
>
> "Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb > im Newsbeitrag news:es******** ******@tk2msftn gp13.phx.gbl...
>> Mark,
>>
>> You get this exception because you don't have rights to create or
>> open
>> the file in the directory that it is set in. You need to try and create > the
>> file in a directory that you have rights to, or, if the file exists,
>> check
>> the rights on the file to make sure that you can open it for writing.
>>
>> Hope this helps.
>>
>>
>> --
>> - Nicholas Paldino [.NET/C# MVP]
>> - mv*@spam.guard. caspershouse.co m
>>
>> "Mark" <Sc********@gmx .net> wrote in message
>> news:dc******** *****@news.t-online.com...
>> > Hello,
>> >
>> > in a simple console application I try to create a file with some
>> > code
>> > like:
>> >
>> > FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
>> > FileAccess.Writ e);
>> > StreamWriter sw = new StreamWriter(fi le);
>> > sw.Write("Hello ");
>> > sw.Close();
>> > file.Close();
>> >
>> > I will get an error System.Security .SecurityExcept ion
>> >
>> > Are there only one way to avoid this and how this can be done?
>> >
>> > Thanks and regards
>> > Mark
>> >
>> >
>>
>>
>
>

[Nicole Calinoiu]

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

hi,

what I am trying:

1. I create a file x.cs with notepad nothing more than a main <snip> 2. built it with csc.exe x.cs and got a x.exe
3. executing x.exe on commandline (local dir, no shares, as admin, no
domain, simple way)
If you're running the exe from a local hard drive (as opposed to somewhere
on your network), it sounds like you might have modified your CAS policy.
To verify what permissions your executable is being assigned under your
current CAS policy, follow the steps listed in the "How can I test my policy
changes?" section at
http://msdn.microsoft.com/library/en...ecpoladmin.asp.
If your assembly is local, and it's granted anything other than an
unrestricted permission set, your CAS policy has been modified from its
default configuration.

If you are running with modified policy, was it a deliberate change or not?
If it wasn't deliberate, you might want to simply revert to the default
configuration (after backing up your current configuration). If it was
deliberate, then adding a new code group to allow your application to run as
desired might be a better approach.

If your assembly is granted unrestricted permissions under policy, might the
problem stem from use of assembly-level permissions attributes? In
particular, might you be using any attributes with
SecurityAction. RequestOptional ?

4. got exception - I guess .NET told me that this application is not safe
writing files.
Request for the permission of type
System.Security .Permissions.Fi leIOPermission, mscorlib,
Version=1.0.500 0.0,
Culture=neutral , PublicKeyToken= b77a5c561934e08 9 failed.

regards
Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb
im Newsbeitrag news:e2******** ******@TK2MSFTN GP14.phx.gbl...

Are you sure that the security exception is for opening the file
then?
Where is the application loaded from? Are you running it from a network
share, or the internet? If so, then the application is going to be

granted

a limited permission set.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

> Hi Nicholas,
>
> I tried a console application and as admin I have no restriction in any
> directory.
>
> regards Mark
>
>
>
> "Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> schrieb > im Newsbeitrag news:es******** ******@tk2msftn gp13.phx.gbl...
>> Mark,
>>
>> You get this exception because you don't have rights to create or
>> open
>> the file in the directory that it is set in. You need to try and create > the
>> file in a directory that you have rights to, or, if the file exists,
>> check
>> the rights on the file to make sure that you can open it for writing.
>>
>> Hope this helps.
>>
>>
>> --
>> - Nicholas Paldino [.NET/C# MVP]
>> - mv*@spam.guard. caspershouse.co m
>>
>> "Mark" <Sc********@gmx .net> wrote in message
>> news:dc******** *****@news.t-online.com...
>> > Hello,
>> >
>> > in a simple console application I try to create a file with some
>> > code
>> > like:
>> >
>> > FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
>> > FileAccess.Writ e);
>> > StreamWriter sw = new StreamWriter(fi le);
>> > sw.Write("Hello ");
>> > sw.Close();
>> > file.Close();
>> >
>> > I will get an error System.Security .SecurityExcept ion
>> >
>> > Are there only one way to avoid this and how this can be done?
>> >
>> > Thanks and regards
>> > Mark
>> >
>> >
>>
>>
>
>

[Nicole Calinoiu]

"Willy Denoyette [MVP]" <wi************ *@telenet.be> wrote in message
news:OL******** ******@TK2MSFTN GP14.phx.gbl...

You loading the executable from a network share.
Actually, it sounds like he probably isn't.

Programs that are loaded from a network are not trusted to access the
local file system, you have to grant "fulltrust" to the the share you are
loading this application from using caspol.exe.
Granting full trust in order to allow writing to one file is a wee bit of
overkill, no? <g>


Willy.
"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...

hi,

what I am trying:

1. I create a file x.cs with notepad nothing more than a main
public static void Main( string[] args )
{
try
{
FileStream file = new FileStream("tes t.txt", FileMode.OpenOr Create,
FileAccess.Writ e);
StreamWriter sw = new StreamWriter(fi le);
sw.Write("Hello ");
sw.Close();
file.Close();
}
catch( Exception ex )
{
Console.WriteLi ne( ex.Message );
};
}

2. built it with csc.exe x.cs and got a x.exe
3. executing x.exe on commandline (local dir, no shares, as admin, no
domain, simple way)
4. got exception - I guess .NET told me that this application is not safe
writing files.
Request for the permission of type
System.Security .Permissions.Fi leIOPermission, mscorlib,
Version=1.0.500 0.0,
Culture=neutral , PublicKeyToken= b77a5c561934e08 9 failed.

regards
Mark

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om>
schrieb
im Newsbeitrag news:e2******** ******@TK2MSFTN GP14.phx.gbl...

Are you sure that the security exception is for opening the file
then?
Where is the application loaded from? Are you running it from a network
share, or the internet? If so, then the application is going to be

granted

a limited permission set.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Mark" <Sc********@gmx .net> wrote in message
news:dc******** *****@news.t-online.com...
> Hi Nicholas,
>
> I tried a console application and as admin I have no restriction in
> any
> directory.
>
> regards Mark
>
>
>
> "Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om>

schrieb

> im Newsbeitrag news:es******** ******@tk2msftn gp13.phx.gbl...
>> Mark,
>>
>> You get this exception because you don't have rights to create or
>> open
>> the file in the directory that it is set in. You need to try and

create

> the
>> file in a directory that you have rights to, or, if the file exists,
>> check
>> the rights on the file to make sure that you can open it for writing.
>>
>> Hope this helps.
>>
>>
>> --
>> - Nicholas Paldino [.NET/C# MVP]
>> - mv*@spam.guard. caspershouse.co m
>>
>> "Mark" <Sc********@gmx .net> wrote in message
>> news:dc******** *****@news.t-online.com...
>> > Hello,
>> >
>> > in a simple console application I try to create a file with some
>> > code
>> > like:
>> >
>> > FileStream file = new FileStream("tes t.txt",
>> > FileMode.OpenOr Create,
>> > FileAccess.Writ e);
>> > StreamWriter sw = new StreamWriter(fi le);
>> > sw.Write("Hello ");
>> > sw.Close();
>> > file.Close();
>> >
>> > I will get an error System.Security .SecurityExcept ion
>> >
>> > Are there only one way to avoid this and how this can be done?
>> >
>> > Thanks and regards
>> > Mark
>> >
>> >
>>
>>
>
>