Programming Questions and Answers for Developers
Developer Q&A Community
Welcome to the NiceOneCode Questions and Answers community, where developers, students, and technology professionals can ask programming questions, share knowledge, and find practical solutions to real-world coding challenges.
Explore hundreds of technical questions covering .NET, ASP.NET Core, C#, SQL Server, JavaScript, Java, PHP, HTML, cloud development, APIs, Entity Framework Core, Blazor, Azure, Docker, debugging, performance optimization, and software architecture.
Whether you are troubleshooting an application error, learning a new technology, preparing for interviews, or looking for best practices, our community-driven Q&A platform helps developers find accurate answers and practical implementation guidance.
Chandel...
12
Points
1
Posts
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I recently looked into
QuikConsole
after seeing multiple discussions about it online. The more I researched, the more I realized how unclear the platform actually is.
Different blogs describe it in completely different ways. Some claim it helps developers manage systems and consoles, while other ...
Views:
226
Total Answered:
0
Total Marked As Answer:
0
Posted On:
11-May-2026 22:44
|
ykl
342
Points
18
Posts
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I'm working on a multi-project ASP.NET Core 9 solution using Entity Framework Core and have been running into some migration-related issues after upgrading. I wanted to start a thread to collect the most common EF Core migration bugs developers are hitting in 2025 — especially around .NET 9 an ...
Views:
285
Total Answered:
1
Total Marked As Answer:
0
Posted On:
29-Apr-2026 03:50
|
Rashmi
1224
Points
22
Posts
|
Gettting following error:
Error: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
var targets = split.Panes.Where(p => p is DockManagerContentPaneState cp && cp.Id == id);
if (targets != null)
{
foreach (var target in targets)
...
Views:
414
Total Answered:
1
Total Marked As Answer:
0
Posted On:
25-Sep-2025 23:23
|
Priya
1436
Points
43
Posts
|
Server crashes exactly at sql async reader in blazor web app:
await using var reader = await command.ExecuteReaderAsync();
Async method:
public async Task<Timezone> GetTimezoneAsync(int componentId, string componentType)
{
string connectionStringElements = ""; //connection string
...
Views:
519
Total Answered:
2
Total Marked As Answer:
2
Posted On:
20-Aug-2025 22:51
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Rashmi
1224
Points
22
Posts
|
I'm trying to execute a store procedure in .net 9.0 with SQL command. For nullable field getting following error:
Error Message: Unable to cast object of type 'System.DBNull' to type 'System.String'.
Error: {"ClassName":"System.InvalidCastException","Message":"Unable to cast object of type 'Syst ...
Views:
642
Total Answered:
1
Total Marked As Answer:
1
Posted On:
13-Aug-2025 05:00
|
Jelly
12
Points
1
Posts
|
I'm trying to migrate .net app from .net 8.0 to .net 9.0. I changed targeted framework to net9.0 in all projects but getting error when compiling:
Assets file '\obj\project.assets.json' doesn't have a target for 'net8.0'. Ensure that restore has run and that you have included 'net8.0' in the Targe ...
Views:
836
Total Answered:
2
Total Marked As Answer:
1
Posted On:
30-Jun-2025 00:54
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Priya
1436
Points
43
Posts
|
Gettinng error with itext pdf during image imbeding:
Result: Failure Exception: System.Exception: Value cannot be null. (Parameter 'buffer') ---> System.ArgumentNullException: Value cannot be null. (Parameter 'buffer') at System.ArgumentNullException.Throw(String paramName) at System.I ...
Views:
833
Total Answered:
2
Total Marked As Answer:
1
Posted On:
04-Jun-2025 22:56
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Priya
1436
Points
43
Posts
|
I'm using .net 8 blazor server app. Some time getting following error:
Error: Connection disconnected with error 'Error: WebSocket closed with status code: 1006 (no reason given)
Views:
1519
Total Answered:
2
Total Marked As Answer:
1
Posted On:
03-Jun-2025 07:58
|
beginer
1576
Points
53
Posts
|
I'm getting following whever setting property in device twin in Azure iot hub device. I'm doing follwoing:
using RegistryManager registryManager = RegistryManager.CreateFromConnectionString(_configuration["IoTHubDeviceConnectionString"]);
var desiredProperties = new TwinCollection();
desiredProp ...
Views:
784
Total Answered:
1
Total Marked As Answer:
1
Posted On:
23-Apr-2025 02:23
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Rashmi
1224
Points
22
Posts
|
I'm getting following error during restore packages in Azure devops pipeline:
"D:\a\1\s\*.csproj" (Restore target) (1) ->
(Restore target) ->
D:\a\1\s\*.csproj : error NU1101: Unable to find package Telerik.Reporting. No packages exist with this id in source(s): C:\Program ...
Views:
728
Total Answered:
1
Total Marked As Answer:
1
Posted On:
26-Mar-2025 04:18
|
Developer Q&A Community
Welcome to the NiceOneCode Questions and Answers community, where developers, students, and technology professionals can ask programming questions, share knowledge, and find practical solutions to real-world coding challenges.
Explore hundreds of technical questions covering .NET, ASP.NET Core, C#, SQL Server, JavaScript, Java, PHP, HTML, cloud development, APIs, Entity Framework Core, Blazor, Azure, Docker, debugging, performance optimization, and software architecture.
Whether you are troubleshooting an application error, learning a new technology, preparing for interviews, or looking for best practices, our community-driven Q&A platform helps developers find accurate answers and practical implementation guidance.
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