TreatWarningsAsErrors

Build Warnings Summary

msbuild.log -- 2026-02-12 -- 173 distinct warnings, 14662 total

#	Code	Description
2308	CS1591	Missing XML comment
2076	CA1707	Remove underscores from names
1658	CS8618	Non-nullable uninitialized
882	CA2007	Call ConfigureAwait
522	CS8602	Possibly null dereference
493	CS8604	Possible null argument
391	IDE0009	Add this qualification
378	CS8625	Null to non-nullable
374	CA1307	Specify StringComparison
342	CS8600	Null to non-nullable type
285	IDE1006	Naming rule violation
285	CA1062	Validate public args
268	CA2000	Dispose objects
222	NU1701	Package compatibility
221	IDE0028	Use collection initializer
182	CA1305	Specify IFormatProvider
182	IDE0055	Fix formatting
172	NU1603	Dependency version mismatch
157	CA2227	Read-only collection props
154	IDE0058	Unused expression value
150	CA1031	Catch specific exceptions
143	CA1002	Do not expose generic lists
143	CA2201	Reserved exception types
118	CS1573	Missing param XML tag
80	IDE0300	Use collection expression
79	IDE0130	Namespace mismatch
77	CS1570	Invalid XML in comment
75	CS8603	Possible null return
71	IDE0073	File header mismatch
68	CA1829	Use Length/Count property
59	CA1822	Mark members as static
58	IDE0065	Using directive placement
56	CA1861	Avoid constant arrays as args
55	IDE0161	Use file-scoped namespace
55	CS8601	Possible null assignment
52	CA1823	Avoid unused private fields
52	IDE0044	Make field readonly
50	CA1826	Use property not Enumerable
48	CA1860	Avoid Enumerable.Any()
47	IDE0011	Add braces
47	CS0108	Hides inherited member
46	CS0618	Obsolete member usage
43	CA1304	Specify CultureInfo
42	CA1311	Specify culture for strings
39	IDE0059	Unnecessary assignment
39	CA1849	Call async in async method
39	MSB3277	Assembly version conflict
38	CA1508	Dead conditional code
38	IDE0060	Remove unused parameter
36	CA1851	Possible multiple enumerations
36	CS8620	Nullability mismatch in arg
33	CA1725	Param names match base
33	IDE0090	Simplify new expression
32	CA1308	Normalize to uppercase
32	CA1720	No type names in identifiers
31	CA1852	Seal internal types
30	CA1310	Specify StringComparison
29	CS0219	Variable assigned not used
28	IDE0010	Add missing switch cases
26	CA1859	Use concrete types
26	IDE0034	Simplify default expression
26	SYSLIB1045	Use GeneratedRegex
24	CA1825	Avoid zero-length arrays
24	CA2234	Pass URIs not strings
23	CA1724	Type name conflicts namespace
23	CS1998	Async lacks await
21	CA2016	Forward CancellationToken
19	CS1572	Param tag no matching param
18	IDE0057	Use range operator
18	CA1507	Use nameof
18	IDE0071	Simplify interpolation
17	CA1819	Properties return arrays
16	CA1051	Visible instance fields
16	IDE0017	Use object initializers
16	CS0168	Variable never used
16	CA1034	Nested types visible
16	CA1001	Types own disposable fields
15	CA1862	Use StringComparison
15	CA1032	Implement exception ctors
15	IDE0301	Use collection expression
15	CA1063	Implement IDisposable
14	IDE0072	Add missing switch cases
14	CS8629	Nullable value may be null
13	CS8632	Nullable annotation context
12	CS0169	Field never used
12	CA2254	Template should be static
12	CA1303	Do not pass literals
12	IDE0040	Add accessibility modifiers
12	CA1848	Use LoggerMessage delegates
11	CA1816	Call GC.SuppressFinalize
11	CA1068	CancellationToken last
11	CA1805	Unnecessary initialization
11	CA1715	Identifier prefix
10	IDE0305	Use collection expression
10	IDE0120	Simplify LINQ
10	CS8605	Unboxing possibly null
10	CA1869	Cache JsonSerializerOptions
9	CA1024	Use properties
9	CS9113	Parameter unread
9	CA1055	URI return not string
9	CS9124	Param in state machine
9	CA2208	Correct ArgumentException
8	CA1863	Use char overload
8	CA1854	Prefer TryGetValue
8	CA1052	Seal static holder types
8	CS4014	Unawaited async call
8	CS3021
7	ASP0019	Use IHeaderDictionary
7	CA1827	Use Any not Count
7	IDE0020	Pattern matching null check
7	IDE0019	Use pattern matching
7	CA5399	Disable cert check
7	CA1716	Identifier matches keyword
6	CS9107	Param captured and assigned
6	SYSLIB0026	Obsolete MutuallyAuth
6	CS8767	Nullability in param
6	CA1866	Use char overload
5	CS8765	Nullability in override
5	CS1587	Misplaced XML comment
5	CA1834	Use StringBuilder char
5	CA1309	Use ordinal StringComparison
5	CA1721	Property matches get method
4	CA1054	URI param not string
4	IDE0100	Unnecessary equality op
4	CA1806	Do not ignore results
4	IDE0004	Remove unnecessary cast
3	CA1847	Use string.Contains(char)
3	CA1836	Prefer IsEmpty over Count
3	IDE0031	Use null propagation
3	IDE0027	Use expression body
3	CA1028	Enum storage Int32
3	CA2211	Non-constant visible fields
3	CS8619	Nullability mismatch
3	IDE0220	Add explicit cast
3	CS8714	Type param constraint
3	CS0649	Field never assigned
3	CS8621	Nullability in return type
2	CS0114	Hides inherited member
2	IDE0200
2	CA1069	Duplicate enum values
2	CA1008	Enums have zero value
2	CA1012	Abstract types no ctors
2	CA1850	Prefer static HashData
2	CA1027	Mark enums with Flags
2	CA5394	Insecure randomness
2	CA1820	Test empty using length
2	CA1812
2	CA1056	URI prop not string
2	CA2213	Dispose disposable fields
2	CA1711	Incorrect identifier suffix
2	CA1845	Use span-based Concat
1	IDE0210
1	CA2215	Call base Dispose
1	CS8622	Nullability in parameter
1	ASP0018	Unused route parameter
1	CA1016	Mark with AssemblyVersion
1	CA1033	Interface callable by child
1	CA1040	Avoid empty interfaces
1	CA1065	Unexpected exception location
1	CA1067	Override Equals for IEquatable
1	CA1416	Platform compatibility
1	CA1510	Use ThrowIfNull
1	CA1844	Memory-based overrides
1	CA1846	Prefer AsSpan
1	CA1867	Use char overload
1	CS0162	Unreachable code
1	CS0659	Missing GetHashCode
1	CS1571	Duplicate param XML tag
1	CS1574	Unresolved cref
1	CS8524	Missing enum switch cases
1	CS8613	Nullability in return
1	IDE0056	Use index operator
1	ASP0000	Avoid BuildServiceProvider
14662	Total

To put this in perspective, here is a summary of the codebase in question. This is not a large codebase by any stretch: roughly 145,000 lines of C# spread across about a thousand files. And yet, 14,662 warnings. That is roughly one warning for every ten lines of code.

===============================================================================
 Language            Files        Lines         Code     Comments       Blanks
===============================================================================
 Batch                   2           51           36            2           13
 C#                   1028       193547       144963        24483        24101
 Dockerfile              2           43           22            8           13
 JSON                  525       235599       235461            0          138
 MSBuild                40         1414         1251           36          127
 PowerShell              3          449          317           72           60
 Python                  4         1561         1214          107          240
 Shell                   6         1308          955          121          232
 SQL                     6          318          291            2           25
 Plain Text             55         6030            0         5855          175
 Visual Studio Sol       6          415          409            0            6
 YAML                  148        20180        18969          715          496
-------------------------------------------------------------------------------
 Markdown               12         1822            0         1382          440
 |- BASH                 2           60           34           16           10
 |- JSON                 1           31           31            0            0
 |- PowerShell           1            5            4            1            0
 |- Python               1           25           14            7            4
 |- SQL                  1            5            5            0            0
 (Total)                           1948           88         1406          454
===============================================================================
 Total                1837       462737       403888        32783        26066
===============================================================================