c sharp type pattern causes compiler error2019 Community Moderator ElectionPublished .Net-Core App won't rundocket build fails with The current .NET SDK does not support targeting .NET Core 2.1Target .Netcore 2.1 on MacVS Code C# extension reporting missing .NETFramework,Version v4.5Navigating to ASP.NET Core app results in “HTTP Error 502.5 - Process Failure” ErrorCode 0x80004005 : 1why .net core app create too many futex calls on linuxIt was not possible to find any compatible framework version when trying to scaffoldRunning 'dotnet publish' updates the SDK to the wrong versionWhy is Microsoft.AspNetCore.App listed under runtimes?Using Jenkins SonarQube MSBuild plugin with dotnet core on linux
Can I negotiate a patent idea for a raise, under French law?
How to recover against Snake as a heavyweight character?
Has a sovereign Communist government ever run, and conceded loss, on a fair election?
Does the US political system, in principle, allow for a no-party system?
Can multiple states demand income tax from an LLC?
Precision notation for voltmeters
Should we avoid writing fiction about historical events without extensive research?
Why is there an extra space when I type "ls" on the Desktop?
std::string vs const std::string& vs std::string_view
I've given my players a lot of magic items. Is it reasonable for me to give them harder encounters?
I am the person who abides by rules but breaks the rules . Who am I
Inorganic chemistry handbook with reaction lists
Why isn't P and P/poly trivially the same?
Too soon for a plot twist?
How to install "rounded" brake pads
How to write a chaotic neutral protagonist and prevent my readers from thinking they are evil?
If nine coins are tossed, what is the probability that the number of heads is even?
What is the oldest European royal house?
I am the light that shines in the dark
Will the concrete slab in a partially heated shed conduct a lot of heat to the unconditioned area?
Giving a talk in my old university, how prominently should I tell students my salary?
After Brexit, will the EU recognize British passports that are valid for more than ten years?
Is this Paypal Github SDK reference really a dangerous site?
Can Witch Sight see through Mirror Image?
c sharp type pattern causes compiler error
2019 Community Moderator ElectionPublished .Net-Core App won't rundocket build fails with The current .NET SDK does not support targeting .NET Core 2.1Target .Netcore 2.1 on MacVS Code C# extension reporting missing .NETFramework,Version v4.5Navigating to ASP.NET Core app results in “HTTP Error 502.5 - Process Failure” ErrorCode 0x80004005 : 1why .net core app create too many futex calls on linuxIt was not possible to find any compatible framework version when trying to scaffoldRunning 'dotnet publish' updates the SDK to the wrong versionWhy is Microsoft.AspNetCore.App listed under runtimes?Using Jenkins SonarQube MSBuild plugin with dotnet core on linux
I have the following catch statement:
catch (CustomException e) when (e.InnerException is MySqlException ex && ex.Number == 1062)
// handle duplicate inserts
This never filters out the exception I need and the statement:
e.InnerException is MySqlException ex && ex.Number == 1062
Causes a compiler error when I watch it with the message: "internal error in the c# compiler" (see image below).
Changing this to the below works:
catch (CustomException e) when (e.InnerException is MySqlException && ((MySql.Data.MySqlClient.MySqlException)e.InnerException).Number == 1062)
// handle duplicate inserts
Can anyone tell me why the first usage does not work? this is part of the documentation found here: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/is#-type-pattern-
Here is my dotnet --info results
.NET Core SDK (reflecting any global.json):
Version: 2.1.503
Commit: 4c506e0f35
Runtime Environment:
OS Name: Windows
OS Version: 10.0.17134
OS Platform: Windows
RID: win10-x64
Base Path: C:Program Filesdotnetsdk2.1.503
Host (useful for support):
Version: 2.1.7
Commit: cca5d72d48
.NET Core SDKs installed:
2.1.202 [C:Program Filesdotnetsdk]
2.1.402 [C:Program Filesdotnetsdk]
2.1.403 [C:Program Filesdotnetsdk]
2.1.503 [C:Program Filesdotnetsdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.4 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.4 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.NETCore.App 2.0.9 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.4 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.5 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.7 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
c# .net-core
asked 2 days ago
Suemayah EldursiSuemayah Eldursi
199621
add a comment |
I have the following catch statement:
catch (CustomException e) when (e.InnerException is MySqlException ex && ex.Number == 1062)
// handle duplicate inserts
This never filters out the exception I need and the statement:
e.InnerException is MySqlException ex && ex.Number == 1062
Causes a compiler error when I watch it with the message: "internal error in the c# compiler" (see image below).
Changing this to the below works:
catch (CustomException e) when (e.InnerException is MySqlException && ((MySql.Data.MySqlClient.MySqlException)e.InnerException).Number == 1062)
// handle duplicate inserts
Can anyone tell me why the first usage does not work? this is part of the documentation found here: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/is#-type-pattern-
Here is my dotnet --info results
.NET Core SDK (reflecting any global.json):
Version: 2.1.503
Commit: 4c506e0f35
Runtime Environment:
OS Name: Windows
OS Version: 10.0.17134
OS Platform: Windows
RID: win10-x64
Base Path: C:Program Filesdotnetsdk2.1.503
Host (useful for support):
Version: 2.1.7
Commit: cca5d72d48
.NET Core SDKs installed:
2.1.202 [C:Program Filesdotnetsdk]
2.1.402 [C:Program Filesdotnetsdk]
2.1.403 [C:Program Filesdotnetsdk]
2.1.503 [C:Program Filesdotnetsdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.4 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.4 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.NETCore.App 2.0.9 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.4 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.5 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.7 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
c# .net-core
asked 2 days ago
Suemayah EldursiSuemayah Eldursi
199621
1
Most likely the adhoc compiler that the debugger is using in your IDE doesn't support pattern matching like this. Why the original statement doesn't catch your exception I don't know, can you post a full set of details about theCustomExceptioninstance you have?
– Lasse Vågsæther Karlsen
2 days ago
This is a relatively new language feature. So which language version are you using?
– Hans Kesting
2 days ago
1
Causes a compiler errorwhat's the error?
– Reniuz
2 days ago
As requested, updated the question with the error message I get in the watch window.
– Suemayah Eldursi
2 days ago
Please post the exception as text and not as an image. An exception message in an image cannot be searched.
– Chris Dunaway
2 days ago
add a comment |
I have the following catch statement:
catch (CustomException e) when (e.InnerException is MySqlException ex && ex.Number == 1062)
// handle duplicate inserts
This never filters out the exception I need and the statement:
e.InnerException is MySqlException ex && ex.Number == 1062
Causes a compiler error when I watch it with the message: "internal error in the c# compiler" (see image below).
Changing this to the below works:
catch (CustomException e) when (e.InnerException is MySqlException && ((MySql.Data.MySqlClient.MySqlException)e.InnerException).Number == 1062)
// handle duplicate inserts
Can anyone tell me why the first usage does not work? this is part of the documentation found here: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/is#-type-pattern-
Here is my dotnet --info results
.NET Core SDK (reflecting any global.json):
Version: 2.1.503
Commit: 4c506e0f35
Runtime Environment:
OS Name: Windows
OS Version: 10.0.17134
OS Platform: Windows
RID: win10-x64
Base Path: C:Program Filesdotnetsdk2.1.503
Host (useful for support):
Version: 2.1.7
Commit: cca5d72d48
.NET Core SDKs installed:
2.1.202 [C:Program Filesdotnetsdk]
2.1.402 [C:Program Filesdotnetsdk]
2.1.403 [C:Program Filesdotnetsdk]
2.1.503 [C:Program Filesdotnetsdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.4 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.4 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.NETCore.App 2.0.9 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.4 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.5 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.7 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
c# .net-core
asked 2 days ago
Suemayah EldursiSuemayah Eldursi
199621
I have the following catch statement:
catch (CustomException e) when (e.InnerException is MySqlException ex && ex.Number == 1062)
// handle duplicate inserts
This never filters out the exception I need and the statement:
e.InnerException is MySqlException ex && ex.Number == 1062
Causes a compiler error when I watch it with the message: "internal error in the c# compiler" (see image below).
Changing this to the below works:
catch (CustomException e) when (e.InnerException is MySqlException && ((MySql.Data.MySqlClient.MySqlException)e.InnerException).Number == 1062)
// handle duplicate inserts
Can anyone tell me why the first usage does not work? this is part of the documentation found here: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/is#-type-pattern-
Here is my dotnet --info results
.NET Core SDK (reflecting any global.json):
Version: 2.1.503
Commit: 4c506e0f35
Runtime Environment:
OS Name: Windows
OS Version: 10.0.17134
OS Platform: Windows
RID: win10-x64
Base Path: C:Program Filesdotnetsdk2.1.503
Host (useful for support):
Version: 2.1.7
Commit: cca5d72d48
.NET Core SDKs installed:
2.1.202 [C:Program Filesdotnetsdk]
2.1.402 [C:Program Filesdotnetsdk]
2.1.403 [C:Program Filesdotnetsdk]
2.1.503 [C:Program Filesdotnetsdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.4 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.4 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.NETCore.App 2.0.9 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.4 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.5 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.7 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
c# .net-core
c# .net-core
asked 2 days ago
Suemayah EldursiSuemayah Eldursi
199621
asked 2 days ago
Suemayah EldursiSuemayah Eldursi
199621
edited 2 days ago
Suemayah Eldursi
asked 2 days ago
Suemayah EldursiSuemayah Eldursi
199621
asked 2 days ago
Suemayah EldursiSuemayah Eldursi
199621
asked 2 days ago
Suemayah EldursiSuemayah Eldursi
199621
199621
1
Most likely the adhoc compiler that the debugger is using in your IDE doesn't support pattern matching like this. Why the original statement doesn't catch your exception I don't know, can you post a full set of details about theCustomExceptioninstance you have?
– Lasse Vågsæther Karlsen
2 days ago
This is a relatively new language feature. So which language version are you using?
– Hans Kesting
2 days ago
1
Causes a compiler errorwhat's the error?
– Reniuz
2 days ago
As requested, updated the question with the error message I get in the watch window.
– Suemayah Eldursi
2 days ago
Please post the exception as text and not as an image. An exception message in an image cannot be searched.
– Chris Dunaway
2 days ago
add a comment |
1
Most likely the adhoc compiler that the debugger is using in your IDE doesn't support pattern matching like this. Why the original statement doesn't catch your exception I don't know, can you post a full set of details about theCustomExceptioninstance you have?
– Lasse Vågsæther Karlsen
2 days ago
This is a relatively new language feature. So which language version are you using?
– Hans Kesting
2 days ago
1
Causes a compiler errorwhat's the error?
– Reniuz
2 days ago
As requested, updated the question with the error message I get in the watch window.
– Suemayah Eldursi
2 days ago
Please post the exception as text and not as an image. An exception message in an image cannot be searched.
– Chris Dunaway
2 days ago
1
1
Most likely the adhoc compiler that the debugger is using in your IDE doesn't support pattern matching like this. Why the original statement doesn't catch your exception I don't know, can you post a full set of details about the
CustomException instance you have?– Lasse Vågsæther Karlsen
2 days ago
Most likely the adhoc compiler that the debugger is using in your IDE doesn't support pattern matching like this. Why the original statement doesn't catch your exception I don't know, can you post a full set of details about the
CustomException instance you have?– Lasse Vågsæther Karlsen
2 days ago
This is a relatively new language feature. So which language version are you using?
– Hans Kesting
2 days ago
This is a relatively new language feature. So which language version are you using?
– Hans Kesting
2 days ago
1
1
Causes a compiler error what's the error?– Reniuz
2 days ago
Causes a compiler error what's the error?– Reniuz
2 days ago
As requested, updated the question with the error message I get in the watch window.
– Suemayah Eldursi
2 days ago
As requested, updated the question with the error message I get in the watch window.
– Suemayah Eldursi
2 days ago
Please post the exception as text and not as an image. An exception message in an image cannot be searched.
– Chris Dunaway
2 days ago
Please post the exception as text and not as an image. An exception message in an image cannot be searched.
– Chris Dunaway
2 days ago
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55023385%2fc-sharp-type-pattern-causes-compiler-error%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55023385%2fc-sharp-type-pattern-causes-compiler-error%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
Most likely the adhoc compiler that the debugger is using in your IDE doesn't support pattern matching like this. Why the original statement doesn't catch your exception I don't know, can you post a full set of details about the
CustomExceptioninstance you have?– Lasse Vågsæther Karlsen
2 days ago
This is a relatively new language feature. So which language version are you using?
– Hans Kesting
2 days ago
1
Causes a compiler errorwhat's the error?– Reniuz
2 days ago
As requested, updated the question with the error message I get in the watch window.
– Suemayah Eldursi
2 days ago
Please post the exception as text and not as an image. An exception message in an image cannot be searched.
– Chris Dunaway
2 days ago