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Where are the environment variables in Docker containers coming from?

I have made a Docker installation for a C# application, and I'm having some issues with the environment (more especially the DOTNET_VERSION, but also the others as can be seen in the "Inspect" tab of Docker-compose). In order to understand the whole situation, I would like to know where the Docker installation gets the mentioned information from. (I didn't find anything in the C# Visual Studio *.csproj file, nor in the Docker(-compose) related *.yml files.)
This is what the current "Inspect" page looks like:
Environment
--------
--------------
DOTNET_USE_POLLING_FILE_WATCHER
1
ASPNETCORE_LOGGING__CONSOLE__DISABLECOLORS
true
ASPNETCORE_ENVIRONMENT
Development
ASPNETCORE_URLS
https://+:443;http://+:80
NUGET_PACKAGES
/root/.nuget/fallbackpackages5
NUGET_FALLBACK_PACKAGES
/root/.nuget/fallbackpackages;...;/root/.nuget/fallbackpackages5
PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
DOTNET_RUNNING_IN_CONTAINER
true
DOTNET_VERSION
5.0.17
ASPNET_VERSION
5.0.17
Mounts
--------
--------------
/APP
C:\Firm\Projecten...\Server\Connections\ConnectionsSvc
/REMOTE_DEBUGGER
C:\Users\Usr\vsdbg\vs2017u5
/SRC
/run/desktop/mnt/host/c/Firm/Projecten/.../AnotherSvc
/ROOT/.NUGET/FALLBACKPACKAGES4
C:\Program Files\dotnet\sdk\NuGetFallbackFolder
/ROOT/.NUGET/FALLBACKPACKAGES5
C:\Users\Usr.nuget\packages\
/ROOT/.ASPNET/HTTPS
C:\Users\Usr\AppData\Roaming\ASP.NET\Https
/ROOT/.MICROSOFT/USERSECRETS
C:\Users\Usr\AppData\Roaming\Microsoft\UserSecrets
/ROOT/.NUGET/FALLBACKPACKAGES
C:\Program Files (x86)\DevExpress 21.2\Components\Offline Packages
/ROOT/.NUGET/FALLBACKPACKAGES2
C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages
/ROOT/.NUGET/FALLBACKPACKAGES3
C:\Program Files (x86)\Progress\ToolboxNuGetPackages
Ports
--------
--------------
443/tcp
0.0.0.0:49154
80/tcp
0.0.0.0:5128
Edit after comments from Benoit.Be:
Pardon my ignorance, but I have no idea where to look for the FROM ... entry you mention.
I'll show you what my "DockerCompose" directory looks like (it's on a Windows computer, but I use a WSL for launching commandline commands):
Prompt> ls -ltra
total 12
-rwxrwxrwx 1 usr usr 5602 Oct 4 09:44 docker-compose.yml
drwxrwxrwx 1 usr usr 4096 Oct 4 09:47 mssqlserver
drwxrwxrwx 1 usr usr 4096 Oct 4 09:47 elasticsearch
drwxrwxrwx 1 usr usr 4096 Oct 4 09:47 rabbitmq
drwxrwxrwx 1 usr usr 4096 Oct 10 11:24 .
-rwxrwxrwx 1 usr usr 1713 Oct 10 11:24 docker-compose.base.yml
drwxrwxrwx 1 usr usr 4096 Oct 10 11:25 Envoy
drwxrwxrwx 1 usr usr 4096 Nov 22 09:33 ..
Prompt> find ./ -maxdepth 3 -type d
./
./elasticsearch
./elasticsearch/data
./elasticsearch/data/nodes
./Envoy
./mssqlserver
./mssqlserver/data
./rabbitmq
./rabbitmq/data
./rabbitmq/data/mnesia
./rabbitmq/log
Where can I look for the mentioned information?
Oh, I've launched a "find in file(s)", looking for the "FROM" keyword, and I found something in the "Envoy" container. Does this mean that that "Envoy" container is what you call the base image?
Here's the entry:
./Envoy/Dockerfile:FROM envoyproxy/envoy-dev:9105f45c7fb872d1db2bf8q9bc608368effe77cd

Progress OpenEdge ERROR [60] [DataDirect][ODBC 20101 driver]6013

I have issue when trying to connect to a progress openedge database using odbc. The client code is in c# and running in docker. Here is my code :
using (OdbcConnection cn = new OdbcConnection("DSN=PROGRESS;UID=username;PWD=pass;"))
{
cn.Open();
}
The issue is that program is crashing at the cn.Open() with the following error : ERROR [60] [DataDirect][ODBC 20101 driver]6013.
I can successfully connect using isql -v PROGRESS username pass and I can query tables.
Environnement :
It is a .NET Core app on a docker environment. Here is my odbc.ini file :
[PROGRESS]
Driver=/usr/lib/x86_64-linux-gnu/pgoe27.so
HostName=192.168.2.11
DatabaseName=dbname
LogonID=username
Password=pass
PortNumber=20000
[ODBC]
Trace=0
TraceFile=odbctrace.out
TraceDll=/usr/lib/openedge/lib/pgtrc27.so
InstallDir=/usr/lib/openedge
I do not understand why I can connect using isql but not using c# OdbcConnection...
Thanks in advance
EDITED
Here is my odbc folder permissions :
# ls -l lib
total 27124
-rwxr-xr-x 1 root root 1782648 Aug 2 13:09 libodbc.so
-rwxr-xr-x 1 root root 1280424 Aug 2 13:09 libodbcinst.so
-rwxr-xr-x 1 root root 14682952 Aug 2 13:09 libpgicu27.so
-rwxr-xr-x 1 root root 1468736 Aug 2 13:09 libpgmback.so
-rwxr-xr-x 1 root root 2351288 Aug 2 13:09 libpgssl27.so
-rwxr-xr-x 1 root root 1586488 Aug 2 13:09 odbccurs.so
-rwxr-xr-x 1 root root 2871272 Aug 2 13:09 pgoe27.so
-rwxr-xr-x 1 root root 1667632 Aug 2 13:09 pgtrc27.so
-rwxr-xr-x 1 root root 63800 Aug 2 13:09 vscnctdlg.so
# ls -lR locale
locale:
total 8
drwxrwxrwx 1 root root 4096 Aug 2 13:09 en_US
locale/en_US:
total 4
drwxrwxrwx 1 root root 4096 Aug 2 13:09 LC_MESSAGES
locale/en_US/LC_MESSAGES:
total 208
-rw-rw-r-- 1 root root 36241 Aug 2 13:09 odbc.m
-rw-rw-r-- 1 root root 19099 Aug 2 13:09 odbc.po
-rw-rw-r-- 1 root root 19096 Aug 2 13:09 pgmback.mo
-rw-rw-r-- 1 root root 11581 Aug 2 13:09 pgmback.po
-rw-rw-r-- 1 root root 72722 Aug 2 13:09 pgoe27.mo
-rw-rw-r-- 1 root root 47627 Aug 2 13:09 pgoe27.po
I have managed connecting specifying connection in my .net program, but I still cannot using DSN + odbc.ini :
OdbcConnectionStringBuilder builder = new OdbcConnectionStringBuilder
{
Driver = "/usr/lib/openedge/lib/pgoe27.so",
};
builder.Add("HostName", "192.168.2.11");
builder.Add("DatabaseName", "PROGRESS");
builder.Add("LogonID", "username");
builder.Add("Password", "password");
builder.Add("PortNumber", "20000");
using (OdbcConnection cnGlims = new OdbcConnection(builder.ConnectionString))
{
cnGlims.Open();
}

According to the Progress Knowledgebase the fact that you are getting error numbers (60, 6013) rather than an error message indicates a configuration problem preventing the message description files from being loaded.
https://knowledgebase.progress.com/articles/Knowledge/3556 says:
Cause: The ODBC driver manager and/or the ODBC driver library cannot
load its message files.
InstallDir is not set correctly in the [ODBC] section of the odbc.ini
file or the message files in locale/en_US/LC_MESSAGES are missing.
Make sure the following are set correctly:
Set the environment variable LANG to en_US :
export LANG=en_US (ksh shell)
setenv LANG en_US (csh shell)
Ensure that the environment variable ODBCINI (or ODBC_INI) is pointing
to the proper odbc.ini file
Ensure that in the [ODBC] section of your odbc.ini file the correct
installation path of the ODBC drivers is specified for InstallDir
e.g. InstallDir=/opt/odbc
Make sure the .mo / .po messages files exist
(odbcinstaldir/locale/en_US/LC_MESSAGES) and can be loaded by your
application
If your installDir is /usr/lib/openedge then you should test for the existence (and permissions) of these files like so:
$ cd /usr/lib/openedge
$ ls -l ./odbc/lib
total 29832
-rwxrwxr-x. 1 root root 1676480 Jan 21 2020 libodbcinst.so
-rwxrwxr-x. 1 root root 2182544 Jan 21 2020 libodbc.so
-rwxrwxr-x. 1 root root 14682952 Jan 21 2020 libpgicu27.so
-rwxrwxr-x. 1 root root 1977640 Jan 21 2020 libpgmback.so
-rwxrwxr-x. 1 root root 2359016 Jan 21 2020 libpgssl27.so
-rwxrwxr-x. 1 root root 2065616 Jan 21 2020 odbccurs.so
-rwxrwxr-x. 1 root root 3383128 Jan 21 2020 pgoe27.so
-rwxrwxr-x. 1 root root 2142864 Jan 21 2020 pgtrc27.so
-rwxrwxr-x. 1 root root 63800 Jan 21 2020 vscnctdlg.so
$ ls -lR ./odbc/locale
./odbc/locale:
total 0
drwxrwxrwx. 3 root root 25 Apr 10 2020 en_US
./odbc/locale/en_US:
total 0
drwxrwxrwx. 2 root root 105 Apr 10 2020 LC_MESSAGES
./odbc/locale/en_US/LC_MESSAGES:
total 212
-rw-rw-r--. 1 root root 36241 Jan 21 2020 odbc.m
-rw-rw-r--. 1 root root 19099 Jul 29 2011 odbc.po
-rw-rw-r--. 1 root root 19096 Jan 21 2020 pgmback.mo
-rw-rw-r--. 1 root root 11581 Jul 29 2011 pgmback.po
-rw-rw-r--. 1 root root 74007 Jan 21 2020 pgoe27.mo
-rw-rw-r--. 1 root root 49045 Jan 21 2020 pgoe27.po

Unclear Sqlite exception after updating my UWP app

After updating the UWP app, I get many crash from the different sections of the app
STOWED_EXCEPTION_Microsoft.Data.Sqlite.SqliteException_80131500***APP-NAME***.dll!Microsoft::Data::Sqlite::SqliteCommand.ExecuteReader
Which did not happend in previous version, I also did not change the database access code section nor updated/reinstalled the EF Sqlite nugget package.
Here are Stacktrace i have received from users:
Thanks
Frame Image Function Offset
0 Microsoft.Data.Sqlite.dll Microsoft::Data::Sqlite::Interop::MarshalEx.ThrowExceptionForRC 0x0000000000000067
1 Microsoft.Data.Sqlite.dll Microsoft::Data::Sqlite::SqliteCommand.ExecuteReader 0x000000000000012F
2 Microsoft.Data.Sqlite.dll Microsoft::Data::Sqlite::SqliteCommand.ExecuteDbDataReader 0x000000000000000B
3 EntityFramework.Relational.dll Microsoft::Data::Entity::Storage::Internal::RelationalCommand::__c__DisplayClass17_0._ExecuteReader_b__0$catch$0 0x0000000000000013
4 SharedLibrary.dll System::Func$1_System::__Canon_.Invoke 0x0000000000000013
5 EntityFramework.Relational.dll Microsoft::Data::Entity::Storage::Internal::RelationalCommand.Execute_System.__Canon_$catch$0 0x00000000000000C1
6 EntityFramework.Relational.dll Microsoft::Data::Entity::Storage::Internal::RelationalCommand.ExecuteReader 0x0000000000000057
7 EntityFramework.Relational.dll Microsoft::Data::Entity::Query::Internal::QueryingEnumerable::Enumerator.MoveNext 0x000000000000008B
8 EntityFramework.Relational.dll Microsoft::Data::Entity::Query::QueryMethodProvider.GetResult_System.Int32_ 0x000000000000003D
9 APPNAME.McgInterop.dll _$ILCT$::$ILT$ReflectionDynamicInvoke$.InvokeRetOI_System.__Canon,System.Int32 0x0000000000000061
10 SharedLibrary.dll System::InvokeUtils.CallIHelperStaticCallWithInstantiation 0x0000000000000023
11 SharedLibrary.dll System::InvokeUtils.CallDynamicInvokeMethod 0x0000000000000119
12 System.Linq.Expressions System::Linq::Expressions::Interpreter::MethodInfoCallInstruction.InvokeWorker$catch$0 0x0000000000000017
13 System.Linq.Expressions System::Linq::Expressions::Interpreter::MethodInfoCallInstruction.Invoke 0x0000000000000009
14 System.Linq.Expressions System::Linq::Expressions::Interpreter::MethodInfoCallInstruction.Run 0x0000000000000065
15 System.Linq.Expressions System::Linq::Expressions::Interpreter::Interpreter.Run 0x0000000000000027
16 System.Linq.Expressions System::Linq::Expressions::Interpreter::LightLambda.Run 0x000000000000009B
17 SharedLibrary.dll System::Runtime::CompilerServices::ConditionalWeakTable$2_System::__Canon,System::__Canon_::CreateValueCallback.InvokeObjectArrayThunk 0x0000000000000037
18 EntityFramework.Core.dll Microsoft::Data::Entity::Query::Internal::QueryCompiler::__c__DisplayClass18_1$1_System::Int32_._CompileQuery_b__1$catch$0 0x0000000000000059
19 SharedLibrary.dll System::Comparison$1_System::__Canon_.Invoke 0x0000000000000013
20 EntityFramework.Core.dll Microsoft::Data::Entity::Query::Internal::QueryCompiler.Execute_System.Int32_ 0x000000000000003D
21 EntityFramework.Core.dll Microsoft::Data::Entity::Query::Internal::EntityQueryProvider.Execute_System.Int32_ 0x0000000000000033
22 System.Linq.Queryable.dll System::Linq::Queryable.Count_System.Int32_ 0x0000000000000121
23 APPNAME*.exe InstagramDownloader::pgHome._imgDownloader_b__15_4 0x0000000000000167
24 APPNAME*.McgInterop.dll Windows::System::Threading::TimerElapsedHandler.Invoke 0x000000000000000F
25 APPNAME*.McgInterop.dll McgInterop::ReverseComSharedStubs.Proc_ 0x0000000000000015
26 SharedLibrary.dll System::Runtime::ExceptionServices::ExceptionDispatchInfo.Throw 0x0000000000000019
27 System.Private.Threading System::Runtime::CompilerServices::TaskAwaiter.ThrowForNonSuccess 0x0000000000000053
28 System.Private.Threading System::Runtime::CompilerServices::TaskAwaiter.HandleNonSuccessAndDebuggerNotification 0x000000000000002D
29 System.Private.Threading System::Runtime::CompilerServices::TaskAwaiter.ValidateEnd 0x000000000000001D
30 System.Private.Threading System::Runtime::CompilerServices::TaskAwaiter.GetResult 0x000000000000000B
31 APPNAME*.exe InstagramDownloader::pgHome::_imgDownloader_d__15.MoveNext 0x00000000000015AF
32 SharedLibrary.dll System::Runtime::ExceptionServices::ExceptionDispatchInfo.Throw 0x0000000000000019
33 System.Private.Threading System::Runtime::CompilerServices::TaskAwaiter.ThrowForNonSuccess 0x0000000000000053
34 System.Private.Threading System::Runtime::CompilerServices::TaskAwaiter.HandleNonSuccessAndDebuggerNotification 0x000000000000002D
35 System.Private.Threading System::Runtime::CompilerServices::TaskAwaiter.ValidateEnd 0x000000000000001D
36 System.Private.Threading System::Runtime::CompilerServices::TaskAwaiter.GetResult 0x000000000000000B
37 APPNAME*.exe InstagramDownloader::pgHome::_btnDownload_Click_d__17.MoveNext 0x000000000000025D
38 APPNAME*.McgInterop.dll McgInterop::McgHelpers.ThrowFailed 0x0000000000000033
39 APPNAME*.McgInterop.dll McgInterop::ComCallHelpers.ComCall__HRESULT 0x00000000000000A9
40 APPNAME*.McgInterop.dll McgInterop::ForwardComSharedStubs.Func_TResult___System.__Canon,_System.__Canon_ 0x000000000000002B
41 APPNAME*.McgInterop.dll Windows::UI::Popups::MessageDialog.ShowAsync 0x0000000000000011
42 APPNAME*.exe InstagramDownloader::pgHome::_btnDownload_Click_d__17.MoveNext$catch$0 0x000000000000002F
43 SharedLibrary.dll System::Runtime::ExceptionServices::ExceptionDispatchInfo.Throw 0x0000000000000019
44 System.Private.Threading System::Runtime::CompilerServices::AsyncMethodBuilderCore::__c._ThrowAsync_b__9_0 0x0000000000000013
45 System.Private.Threading System::Threading::WinRTSynchronizationContext::Invoker.InvokeCore 0x0000000000000033

I suggest updating all SQLite-related packages on NuGet as well as the SQLite extension for Visual Studio (via Tools -> Extensions and Updates...)
Update
As I have learned, you use EntityFrameworkCore, which works only with Windows 10 Fall Creators Update and newer and will not work on older versions of UWP. To get rid of the issues, you will have to set your app to have minimum SDK version 16299 (FCU). If you need to support older versions, you will have to work without Entity Framework for now...

Xamarin.IOS exception while running ibtool: object cannot be nil (key: family)

I'm getting a weird error while trying to build my solution:
Exception while running ibtool: *** setObjectForKey: object cannot be nil (key: family)
I've googled it but there is no answers to this problem, just questions... Maybe worth mentioning is that I use Visual Studio Community 2015, I got the latest Xcode installed on my Mac and I have a updated iPhone 5s connected to the Mac. The OS on my Mac is El Capitan (10.11.4).
I think this problem mainly comes from my storyboard, at first I got this error when i tried to create a segue for a button between two views. I removed it and it worked as usual, now I got the same error later on in this project and it's not thanks to the segue.
If I exclude my storyboard, I can build the solution without any trouble, but I can't run the app on my iPhone since the storyboard is missing.
Anyone got a clue what the problem might be? Here are the error logs if necessary:
Severity Code Description Project File Line Source Suppression State
Error Exception while running ibtool: *** setObjectForKey: object cannot be nil (key: family)
Backtrace:
0 __exceptionPreprocess (in CoreFoundation)
1 objc_exception_throw (in libobjc.A.dylib)
2 -[__NSDictionaryM setObject:forKey:] (in CoreFoundation)
3 0x00000001181c6b41 (in IDEInterfaceBuilderCocoaTouchIntegration)
4 0x000000011814ee00 (in IDEInterfaceBuilderCocoaTouchIntegration)
5 0x000000011814d775 (in IDEInterfaceBuilderCocoaTouchIntegration)
6 0x000000011815f133 (in IDEInterfaceBuilderCocoaTouchIntegration)
7 0x000000011815eeac (in IDEInterfaceBuilderCocoaTouchIntegration)
8 0x000000011815ec66 (in IDEInterfaceBuilderCocoaTouchIntegration)
9 0x000000011815d934 (in IDEInterfaceBuilderCocoaTouchIntegration)
10 0x00000001181cb205 (in IDEInterfaceBuilderCocoaTouchIntegration)
11 0x00000001181ccce7 (in IDEInterfaceBuilderCocoaTouchIntegration)
12 -[IBDocumentCompiler invokeWhileUsingSourceAsIntermediateDocument:] (in IDEInterfaceBuilderKit)
13 -[IBDocumentCompiler invokeWithIntermediateDocumentOfTargetRuntime:alwaysCopy:block:] (in IDEInterfaceBuilderKit)
14 0x00000001181cc40a (in IDEInterfaceBuilderCocoaTouchIntegration)
15 0x00000001181b8b4d (in IDEInterfaceBuilderCocoaTouchIntegration)
16 -[IBStoryboardSceneCompilationGroup compilationResultsForCompilationUnits:options:returningErrors:] (in IDEInterfaceBuilderKit)
17 -[IBStoryboardDocumentCompiler compileUnitsFromCompilationGroups:filter:options:errors:] (in IDEInterfaceBuilderKit)
18 __78-[IBStoryboardDocumentCompiler compileContentsOfStoryboardWithOptions:errors:]_block_invoke (in IDEInterfaceBuilderKit)
19 IBWithAutoInvalidationPool (in IDEInterfaceBuilderKit)
20 -[IBStoryboardDocumentCompiler compileContentsOfStoryboardWithOptions:errors:] (in IDEInterfaceBuilderKit)
21 -[IBStoryboardDocumentCompiler internalCompileWithOptions:error:] (in IDEInterfaceBuilderKit)
22 0x00000001181b8f5e (in IDEInterfaceBuilderCocoaTouchIntegration)
23 __57-[IBStoryboardDocumentCompiler compileWithOptions:error:]_block_invoke (in IDEInterfaceBuilderKit)
24 -[IBDocumentCompiler invokeWithIntermediateDocument:] (in IDEInterfaceBuilderKit)
25 -[IBDocumentCompiler invokeWithIntermediateDocumentOfTargetRuntime:alwaysCopy:block:] (in IDEInterfaceBuilderKit)
26 -[IBStoryboardDocumentCompiler compileWithOptions:error:] (in IDEInterfaceBuilderKit)
27 +[IBDocumentCompiler compileContentsOfDocument:options:error:] (in IDEInterfaceBuilderKit)
28 __47-[IBDocument compiledPackageWithOptions:error:]_block_invoke (in IDEInterfaceBuilderKit)
29 -[IBDocumentAutolayoutManager ignoreAutolayoutStatusInvalidationDuring:] (in IDEInterfaceBuilderKit)
30 -[IBDocument compiledPackageWithOptions:error:] (in IDEInterfaceBuilderKit)
31 -[IBDocument compileAndWriteToPath:withOptions:error:] (in IDEInterfaceBuilderKit)
32 0x000000010ceb52da (in ibtoold)
33 0x000000010ceb10e7 (in ibtoold)
34 0x000000010ceb36ab (in ibtoold)
35 0x000000010ceb75c8 (in ibtoold)
36 0x000000010ceb7c5a (in ibtoold)
37 0x000000010ceb7b2d (in ibtoold)
38 0x000000010cea695b (in ibtoold)
39 0x000000010ceb71c3 (in ibtoold)
40 0x000000010ceb6274 (in ibtoold)
41 start (in libdyld.dylib) FridgeMe.iOS Build
Edit: I removed my second view controller and created a whole new one, this seems to have fixed the problem. Still not sure what was causing the problem, but if anyone knows I would really like to know if this happens agian.
Edit 2: The error came back as soon as I added a button on the other (new) view controller. It also refers to a run time error regarding the button not having a code behind (which I thought was created when you added the button on the storyboard). See the image.
Seems like the code for the button isn't generated properly.
I'm hoping this could be some help for other people who run into this issue. I'm still a bit stuck since I tried to manually copy everything regarding a button (changing it's name of course) from my working view controller to the new one, but I don't seem to get it to work.
I have added following to my ViewControllerCreate.designer.cs:
UIKit.UIButton BtnCreateAccount { get; set; }
void ReleaseDesignerOutlets()
{
if (BtnCreateAccount != null)
{
BtnCreateAccount.Dispose();
BtnCreateAccount = null;
}
}
Any ideas?

i got the same error.
After analyzing the code main.storyboard, I discovered that, in my case, the error jump if a button or other control has something like:
<fontDescription key="fontDescription" name="HelveticaNeue" pointSize="17" />
The family font is the problem, try change to
<fontDescription key="fontDescription" type="system" pointSize="17" /> or just delete de line.
Regards,
Marcelo

I am not sure the following code may be helpful for you.
internal class CustomUIView : UIView
{
internal CustomUIView(IntPtr value) :base(value)
{
}
}
Example:
UIView view = new CustomUIView(IntPtr.Zero);
Refer for more information here

I need to write a dataset as XML data

I need to generate the following xml output from the following dataset. I have attached the dataset and the xml output sample. I am going to put the C# code in a SSIS script task. Can you guys help me to write to code in C#. I am a database guy but i really don't know how this XML works with dataset. I'd really appricate if you can help. Thanks In advance.
AGENTID STARTDAY STARTMONTH STARTYEAR STARTHOUR STARTMINUTE ENDHOUR ENDMINUTE EXCEPTION
910180 5 5 2011 10 30 11 0 OPEN
910180 5 5 2011 11 0 11 30 OPEN
910180 5 5 2011 11 30 12 0 OPEN
910180 6 5 2011 17 30 18 0 OPEN
910180 7 5 2011 18 0 18 30 OPEN
911568 6 5 2011 16 30 17 0 OPEN
911568 6 5 2011 19 0 19 30 OPEN
911568 6 5 2011 19 30 20 0 OPEN
911568 6 5 2011 20 0 20 30 OPEN
911568 6 5 2011 20 30 21 0 OPEN
911568 6 5 2011 21 0 21 30 OPEN
911568 6 5 2011 22 0 22 30 OPEN
911568 7 5 2011 10 30 11 0 OPEN
911568 7 5 2011 11 0 11 30 OPEN
<?xml version="1.0" encoding="ISO-8859-1" ?>
<agentScheduleList>
<agent>
<id>470185</id>
<schedule>
<day>12</day>
<month>8</month>
<year>2002</year>
<exception>
<startdate>
<day>12</day>
<month>8</month>
<year>2002</year>
</startdate>
<starttime>
<hour>22</hour>
<min>0</min>
</starttime>
<endtime>
<hour>2</hour>
<min>0</min>
</endtime>
<code>Open</code>
</exception>
<exception>
<startdate>
<day>13</day>
<month>8</month>
<year>2002</year>
</startdate>
<starttime>
<hour>2</hour>
<min>0</min>
</starttime>
<endtime>
<hour>3</hour>
<min>0</min>
</endtime>
<code>Lunch</code>
</exception>
<exception>
<startdate>
<day>13</day>
<month>8</month>
<year>2002</year>
</startdate>
<starttime>
<hour>3</hour>
<min>0</min>
</starttime>
<endtime>
<hour>7</hour>
<min>0</min>
</endtime>
<code>Open</code>
</exception>
</schedule>
</agent>
<agent>
<id>470185</id>
<schedule>
<day>13</day>
<month>8</month>
<year>2002</year>
<offexception/>
</schedule>
</agent>
</agentScheduleList>

The DataSet class has a WriteXml function to write your data to a file, or GetXml to return it as a string. The documentation on MSDN has further explanation of customizing the output to get it to match exactly what you need, if your XML structure differs from your database structure.

I think you can just use:
string xml = yourDataSet.GetXml();
You can read it back into a DataSet using the DataSet method ReadXml.
You can also use the following to get an XmlDataDocument:
System.Xml.XmlDataDocument xmlDoc = new System.Xml.XmlDataDocument(yourDataSet);