icsharpcode/CodeConverter

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Convert code from C# to VB.NET and vice versa using Roslyn

Stars: 913
Forks: 244
Open beginner issues: 0
Indexed issues: 101

Dominant language: C#
License: MIT
Last GitHub push: Aug 20, 2026
Latest indexed: Sep 17, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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101 open issues indexed

C# -> VB: most pattern matching fails to convert Open

C# -> VB

Difficulty 4/5 3-5 days Newbie friendliness 35/100

icsharpcode/CodeConverter#1281 · Opened Sep 4, 2026
C# -> VB: Conversion for Unsafe Statement not implemented Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

icsharpcode/CodeConverter#1275 · Opened Aug 18, 2026
VB -> C#: Handleres of sub properties being untracked Open

VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 62/100

icsharpcode/CodeConverter#1273 · Opened Jul 30, 2026
VB -> C#: "Group By Into" Linq queries supressing aggregations ("Into" part) in the converted code Open

Difficult area VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 74/100

icsharpcode/CodeConverter#1272 · Opened Jul 22, 2026
.slnx solution files still cause "No file format header found" in v10.0.1 Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

icsharpcode/CodeConverter#1271 · 1 comment · Opened Jul 2, 2026
The 'CodeConverterPackage' package did not load correctly. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

icsharpcode/CodeConverter#1270 · Opened Jun 23, 2026
VB -> C#: Avoid creating code blocks for each case when converting Select Case Open

enhancement Good for coding agent

Difficulty 3/5 1-2 days Newbie friendliness 65/100

icsharpcode/CodeConverter#1244 · 1 reaction · Opened Apr 6, 2026
VB -> C#: Avoid loopTo in for loops if possible Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

icsharpcode/CodeConverter#1243 · 2 comments · Opened Apr 6, 2026
VB -> C#: Enum Values as Integer Open

Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1212 · 2 comments · Opened Feb 9, 2026
VB -> C#: Collection Initializers/Collection Expressions Open

VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 48/100

icsharpcode/CodeConverter#1211 · Opened Feb 9, 2026
VB -> C#:Linq group by queries bugs Open

compilation error needs-repro VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 35/100

icsharpcode/CodeConverter#1180 · 1 comment · 1 reaction · Opened May 6, 2025
VB -> C#: Multi line strings Open

compilation error good first issue Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1173 · 4 comments · 1 reaction · Opened Apr 2, 2025
VB -> C#: Cannot convert QueryExpressionSyntax, System.InvalidOperationException: Sequence contains more than one element when converting a specific Linq query Open

exception caught VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 55/100

icsharpcode/CodeConverter#1172 · 1 reaction · Opened Apr 2, 2025
Fails to convert multiple NativeMethod Files From C# To VB Open

C# -> VB

Difficulty 4/5 3-5 days Newbie friendliness 30/100

icsharpcode/CodeConverter#1171 · 7 comments · Opened Mar 27, 2025
VB -> C#: XAML Bindings don't work properly Open

VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1169 · 1 reaction · Opened Feb 24, 2025
VB -> C#: Convert MsgBox to MessageBox.Show Open

VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 52/100

icsharpcode/CodeConverter#1166 · Opened Feb 4, 2025
VB -> C#: LINQ query syntax conversion is incorrect when `Select` is followed by `Where` Open

VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1163 · 1 reaction · Opened Jan 9, 2025
VB -> C#: IEnumerable linq extension methods are replaced with static Enumerable methods Open

Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 35/100

icsharpcode/CodeConverter#1149 · 2 comments · Opened Nov 4, 2024
When converting a WPF form, the Handles command in the code behind file is skipped. Open

VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 42/100

icsharpcode/CodeConverter#1141 · 6 comments · Opened Oct 17, 2024
VB -> C#: incorrect handling of ref arguments in loop conditions Open

Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 50/100

icsharpcode/CodeConverter#1129 · Opened Aug 28, 2024
VB -> C#: Out attribute not respected with latest visual studio version Open

Good for coding agent help wanted VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 30/100

icsharpcode/CodeConverter#1119 · Opened Jul 20, 2024
C# -> VB: Extension Methods incorrect Open

C# -> VB

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1118 · 1 reaction · Opened Jul 20, 2024
C# -> VB: Target typed new does not convert Open

C# -> VB

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1112 · 1 comment · Opened Jul 3, 2024
C# -> VB: Simple assignment expression inside a constructor expression body converts to using CSharpImpl.__Assign. Open

C# -> VB enhancement

Difficulty 3/5 1-2 days Newbie friendliness 50/100

icsharpcode/CodeConverter#1105 · Opened May 28, 2024
Conversion for FixedStatement not implemented Open

C# -> VB

Difficulty 4/5 3-5 days Newbie friendliness 35/100

icsharpcode/CodeConverter#1101 · 3 comments · Opened May 17, 2024
VB -> C#: multiline interpolated string with just format-blocks doesn't convert correctly (missing @) Open

Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 52/100

icsharpcode/CodeConverter#1096 · 1 reaction · Opened Apr 25, 2024
Speedup conversion time for code without "MyClass" and "WithEvents / Handles" Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

icsharpcode/CodeConverter#1090 · 3 comments · Opened Apr 10, 2024
VB -> C#: `= ""` should not be converted to `string.IsNullOrEmpty` when `Option Compare Text` Open

Good for coding agent output logic error VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1089 · 2 reactions · Opened Apr 6, 2024
VB -> C#: ASP.NET Inherits-attribute in aspx file does not get renamed properly Open

VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1088 · Opened Apr 3, 2024
VB -> C#: `(int)Math.Round(x)` is used instead of `Convert.ToInt32(x)` Open

enhancement Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1082 · 5 comments · Opened Mar 6, 2024
VB -> C#: Byref optional parameters to New field initializer can throw nullref Open

Good for coding agent VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 42/100

icsharpcode/CodeConverter#1081 · Opened Feb 24, 2024
VB -> C#: supporting variable for WithEvents gets non-existent type in some cases Open

compilation error VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1055 · Opened Dec 5, 2023
VB to C# Conversion doesn't update other project references to .csproj Open

Good for coding agent VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 32/100

icsharpcode/CodeConverter#1040 · 1 comment · Opened Nov 6, 2023
Options for migration of string comparisons (helper method?) Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

icsharpcode/CodeConverter#1034 · 6 comments · 1 reaction · Opened Sep 23, 2023
VB -> C#: Conversion of ValueTuple causes compile error Open

Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1027 · 1 comment · Opened Jul 31, 2023
Extension method invocations are not simplified Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

icsharpcode/CodeConverter#1026 · 1 comment · Opened Jul 24, 2023
Exception after "Convert to C#" in unsaved window Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

icsharpcode/CodeConverter#1023 · 3 comments · Opened Jul 12, 2023
C# -> VB: `Math.Truncate` is not added when converting Double(/Decimal) to Integer Open

C# -> VB Good for coding agent output logic error

Difficulty 3/5 1-2 days Newbie friendliness 52/100

icsharpcode/CodeConverter#1021 · 1 reaction · Opened Jul 2, 2023
VB -> C#: Optimize Double(/Decimal)-to-Integer conversion Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

icsharpcode/CodeConverter#1020 · 4 comments · Opened Jun 27, 2023
VB -> C#: LINQ orderby and select are in wrong order Open

enhancement VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 52/100

icsharpcode/CodeConverter#1016 · Opened May 8, 2023
VB -> C#: InvalidOperationException caused by LINQ GroupBy with multiple properties Open

VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 35/100

icsharpcode/CodeConverter#1014 · 1 comment · Opened May 8, 2023
Add readmes to nuget.org packages Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

icsharpcode/CodeConverter#1008 · Opened May 4, 2023
VB -> C#: Basic WPF Transformations Open

help wanted VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 38/100

icsharpcode/CodeConverter#995 · 1 reaction · Opened Mar 17, 2023
C# -> VB: Switch Expression in Return Statement Converts to an Empty String Open

C# -> VB

Difficulty 3/5 1-2 days Newbie friendliness 48/100

icsharpcode/CodeConverter#983 · 1 comment · Opened Jan 26, 2023
C# -> VB: unchecked can cause compile error Open

C# -> VB

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#981 · 2 comments · Opened Jan 10, 2023
C# -> VB: Expected VB code is invalid in the test Conflict_DeclarationsAfterConvertionForToWhileAsync Open

C# -> VB

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#972 · 2 comments · Opened Dec 23, 2022
VB -> C#: If interface and class member differ only by capitalization, the class member's case is changed. Open

VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 35/100

icsharpcode/CodeConverter#963 · 2 comments · Opened Dec 5, 2022
VB -> C#: XML literals should be XML-decoded Open

Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#961 · 3 comments · Opened Dec 2, 2022
VB -> C#: Switch on Object type results in behaviour change when cases are a different type Open

VB -> C#

Difficulty 4/5 3-5 days Newbie friendliness 35/100

icsharpcode/CodeConverter#951 · 1 comment · Opened Nov 2, 2022
VB -> C#: The LINQ-to-XML attribute axis accessor should be translated as a call to XElement.Attribute rather than XElement.Attributes. Open

Good for coding agent VB -> C#

Difficulty 3/5 1-2 days Newbie friendliness 45/100

icsharpcode/CodeConverter#950 · 1 comment · Opened Oct 30, 2022

icsharpcode/CodeConverter

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