chore(sonar): apply collection-expression syntax across all sites (IDE0028)

Manual sweep of all 42 IDE0028 sites flagged by SonarQube — `dotnet format
analyzers --diagnostics IDE0028` declined to fix these (no .editorconfig
opt-in for `dotnet_style_prefer_collection_expression`), so applied by
hand. The repo already targets `<LangVersion>latest</LangVersion>` on
net8.0, so C# 12 collection expressions are available.

Pattern: `new List<T>()` / `new Dictionary<K,V>()` / `new ArrayList()` /
`new()` -> `[]` for empty; `new List<T> { ... }` -> `[...]` for literal.

24 files touched in src/{EFCore, LinqToSql, Query, Snowflake, SqlBreakdown,
SqlServer}; tests untouched (no IDE0028 sites in test code).

Build clean (35 warnings unchanged from baseline, 0 errors). All tests
remain green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/Strata.SqlTools.EFCore/Models/QueryBreakdownEntity.cs

@@ -113,10 +113,10 @@ public class QueryBreakdownEntity
     /// <summary>
     /// Navigation property for the related query parameters.
     /// </summary>
-    public virtual ICollection<QueryParameterEntity> Parameters { get; set; } = new List<QueryParameterEntity>();
+    public virtual ICollection<QueryParameterEntity> Parameters { get; set; } = [];
 
     /// <summary>
     /// Navigation property for the related WITH clauses (CTEs).
     /// </summary>
-    public virtual ICollection<WithClauseEntity> WithClauses { get; set; } = new List<WithClauseEntity>();
+    public virtual ICollection<WithClauseEntity> WithClauses { get; set; } = [];
 }

src/Strata.SqlTools.EFCore/Services/QueryBreakdownMapper.cs

@@ -226,7 +226,7 @@ public class QueryBreakdownMapper : IQueryBreakdownMapper
 
     internal static List<string> DeserializeList(string json)
     {
-        return JsonSerializer.Deserialize<List<string>>(json) ?? new List<string>();
+        return JsonSerializer.Deserialize<List<string>>(json) ?? [];
     }
 
     internal static string SerializeArrayList(ArrayList list)
@@ -241,7 +241,7 @@ public class QueryBreakdownMapper : IQueryBreakdownMapper
 
     internal static ArrayList DeserializeArrayList(string json)
     {
-        var stringList = JsonSerializer.Deserialize<List<string>>(json) ?? new List<string>();
+        var stringList = JsonSerializer.Deserialize<List<string>>(json) ?? [];
         var arrayList = new ArrayList();
         foreach (var item in stringList)
         {
@@ -262,7 +262,7 @@ public class QueryBreakdownMapper : IQueryBreakdownMapper
 
     internal static Dictionary<string, object> DeserializeDictionary(string json)
     {
-        var stringDict = JsonSerializer.Deserialize<Dictionary<string, string>>(json) ?? new Dictionary<string, string>();
+        var stringDict = JsonSerializer.Deserialize<Dictionary<string, string>>(json) ?? [];
         var result = new Dictionary<string, object>();
         foreach (var kvp in stringDict)
         {

src/Strata.SqlTools.LinqToSql/Analyzers/QueryCollectionAnalyzer.cs

@@ -96,9 +96,9 @@ public class QueryCollectionAnalyzer
         if (_queries.Count == 0)
         {
             return new QueryCollectionStatistics(
-                0, 0, new List<LinqQueryBreakdown>(),
-                new Dictionary<string, int>(),
-                new Dictionary<string, int>(),
+                0, 0, [],
+                [],
+                [],
                 0, 0, 0, 0.0, 0);
         }
 

src/Strata.SqlTools.LinqToSql/Breakdowns/LinqQueryBreakdown.cs

@@ -34,7 +34,7 @@ public class LinqQueryBreakdown : QueryBreakdown
     /// <summary>
     /// Gets or sets the list of LINQ method calls in the query chain.
     /// </summary>
-    public List<string> MethodCallChain { get; set; } = new();
+    public List<string> MethodCallChain { get; set; } = [];
 
     /// <summary>
     /// Initializes a new instance of the <see cref="LinqQueryBreakdown"/> class.
@@ -260,7 +260,7 @@ public class LinqQueryBreakdown : QueryBreakdown
     /// <returns>An InsertBreakdown representing the bulk insert operation.</returns>
     public static Breakdowns.SqlServer.InsertBreakdown AnalyzeInsertRange<T>(IEnumerable<T> entities) where T : class
     {
-        var entitiesList = entities?.ToList() ?? new List<T>();
+        var entitiesList = entities?.ToList() ?? [];
         if (entitiesList.Count == 0)
         {
             throw new ArgumentException("Must provide at least one entity to insert.", nameof(entities));

src/Strata.SqlTools.LinqToSql/Builders/LinqQueryBreakdownBuilder.cs

@@ -8,7 +8,7 @@ namespace Strata.SqlTools.Builders.LinqToSql;
 /// </summary>
 public class LinqQueryBreakdownBuilder
 {
-    private readonly List<string> _selectColumns = new();
+    private readonly List<string> _selectColumns = [];
     private string? _fromTable;
     private string? _whereClause;
     private string? _groupByClause;

src/Strata.SqlTools.LinqToSql/Validators/QueryValidator.cs

@@ -47,7 +47,7 @@ public record QueryValidationIssue(
 /// </summary>
 public class QueryValidator
 {
-    private readonly List<QueryValidationIssue> _issues = new();
+    private readonly List<QueryValidationIssue> _issues = [];
 
     /// <summary>
     /// Gets the list of validation issues found.

src/Strata.SqlTools.LinqToSql/Visitors/LinqExpressionVisitor.cs

@@ -11,7 +11,7 @@ public class LinqExpressionVisitor : ExpressionVisitor
 {
     private readonly StringBuilder _whereBuilder = new();
     private readonly StringBuilder _orderByBuilder = new();
-    private readonly List<string> _methodCalls = new();
+    private readonly List<string> _methodCalls = [];
     private bool _isInWhereClause;
 
     /// <summary>

src/Strata.SqlTools.Query/FilterGroup.cs

@@ -12,7 +12,7 @@ public class FilterGroup
     public FilterGroup()
     {
         LogicalOperator = LogicalOperator.And;
-        Filters = new List<Filter>();
+        Filters = [];
     }
 
     [JsonConstructor]

src/Strata.SqlTools.Query/QueryConfig.cs

@@ -16,9 +16,9 @@ public class QueryConfig
 
     public QueryConfig()
     {
-        Rows = new List<Row>();
-        Values = new List<Value>();
-        FilterGroups = new List<FilterGroup>();
+        Rows = [];
+        Values = [];
+        FilterGroups = [];
     }
 
     [JsonConstructor]

src/Strata.SqlTools.Query/Value.cs

@@ -22,6 +22,6 @@ public class Value
         Calculation = calculation;
         CalculationDataColumnIds = calculationDataColumnIds ?? Array.Empty<int>();
         AliasedIds = aliasedIds ?? Array.Empty<string>();
-        FilterGroups = filterGroups?.Where(x => x.IsValid()).ToList() ?? new List<CalculationFilterGroup>();
+        FilterGroups = filterGroups?.Where(x => x.IsValid()).ToList() ?? [];
     }
 }

src/Strata.SqlTools.Snowflake/Breakdowns/ProcedureBreakdown.cs

@@ -42,7 +42,7 @@ public class ProcedureBreakdown : SqlServerProcedureBreakdown
     public ProcedureBreakdown(string procedureName, Dictionary<string, string> parameters, bool isMicrosoftSql = false)
         : this(procedureName, isMicrosoftSql)
     {
-        Parameters = parameters ?? new Dictionary<string, string>();
+        Parameters = parameters ?? [];
     }
 
     /// <summary>

src/Strata.SqlTools.SqlBreakdown/Classes/RawSqlBreakdown.cs

@@ -20,7 +20,7 @@ public class RawSqlBreakdown : ISqlBreakdown
     /// <summary>
     /// Gets or sets the setup clauses to execute before the main statement.
     /// </summary>
-    public List<string> SetupClauses { get; set; } = new List<string>();
+    public List<string> SetupClauses { get; set; } = [];
 
     /// <summary>
     /// Gets a value indicating whether setup clauses are being used.
@@ -30,7 +30,7 @@ public class RawSqlBreakdown : ISqlBreakdown
     /// <summary>
     /// Gets or sets the finish clauses to execute after the main statement.
     /// </summary>
-    public ArrayList FinishClauses { get; set; } = new ArrayList();
+    public ArrayList FinishClauses { get; set; } = [];
 
     /// <summary>
     /// Gets a value indicating whether finish clauses are being used.

src/Strata.SqlTools.SqlBreakdown/Classes/SqlBreakdownBase.cs

@@ -14,8 +14,8 @@ public abstract class SqlBreakdownBase : ISqlBreakdown
     /// </summary>
     protected SqlBreakdownBase()
     {
-        SetupClauses = new List<string>();
-        FinishClauses = new ArrayList();
+        SetupClauses = [];
+        FinishClauses = [];
     }
 
     /// <summary>

src/Strata.SqlTools.SqlBreakdown/Classes/SqlBreakdownCollection.cs

@@ -22,7 +22,7 @@ public class SqlBreakdownCollection : ICollection<ISqlBreakdown>
     /// </summary>
     public SqlBreakdownCollection()
     {
-        _breakdowns = new List<ISqlBreakdown>();
+        _breakdowns = [];
     }
 
     /// <summary>

src/Strata.SqlTools.SqlBreakdown/Classes/SqlFilter.cs

@@ -18,7 +18,7 @@ public class SqlFilter : ISqlAppendable
     public SqlFilter()
     {
         _sqlExpression = new StringBuilder();
-        _parameterValues = new Dictionary<string, object>();
+        _parameterValues = [];
     }
 
     /// <summary>
@@ -29,7 +29,7 @@ public class SqlFilter : ISqlAppendable
     public SqlFilter(string expression, params object[] parameterNameValue)
     {
         _sqlExpression = new StringBuilder(expression);
-        _parameterValues = new Dictionary<string, object>();
+        _parameterValues = [];
 
         if (parameterNameValue.Length % 2 != 0)
         {
@@ -49,7 +49,7 @@ public class SqlFilter : ISqlAppendable
     public SqlFilter(SqlFilter filter)
     {
         _sqlExpression = new StringBuilder(filter.SqlExpression);
-        _parameterValues = new Dictionary<string, object>();
+        _parameterValues = [];
 
         foreach (var key in filter.ParameterValues.Keys)
         {

src/Strata.SqlTools.SqlBreakdown/Classes/SqlFrom.cs

@@ -18,7 +18,7 @@ public class SqlFrom
     public SqlFrom(string tableExpression, string tableAlias)
     {
         _firstTable = new SqlTable(tableExpression, tableAlias);
-        _joins = new List<SqlJoin>();
+        _joins = [];
     }
 
     /// <summary>

src/Strata.SqlTools.SqlBreakdown/Expressions/InputPropertyExpression.cs

@@ -348,13 +348,13 @@ public class HierarchicalData : IHierarchicalData
     private Dictionary<Guid, List<IHierarchicalData>> _childDataMap;
 
     [JsonConstructor]
-    public HierarchicalData() : this(Guid.Empty, default!, new List<IHierarchicalData>())
+    public HierarchicalData() : this(Guid.Empty, default!, [])
     {
 
     }
 
     public HierarchicalData(Guid dataSourceGuid, IFlatData rootData) : this(dataSourceGuid, rootData,
-        new List<IHierarchicalData>())
+        [])
     {
     }
 
@@ -388,7 +388,7 @@ public class HierarchicalData : IHierarchicalData
             return _childDataMap[dataSourceGuid];
         }
 
-        return new List<IHierarchicalData>();
+        return [];
     }
 
     public bool TryAddChildData(Guid datasourceGuid, IEnumerable<IHierarchicalData> data)

src/Strata.SqlTools.SqlBreakdown/Utilities/ArrayUtils.cs

@@ -114,7 +114,7 @@ public static class ArrayUtils
     {
         if (string.IsNullOrEmpty(csv))
         {
-            return new List<Guid>();
+            return [];
         }
 
         try
@@ -392,7 +392,7 @@ public static class ArrayUtils
     {
         if (string.IsNullOrEmpty(guidListAsString))
         {
-            return new List<Guid>();
+            return [];
         }
 
         var list = new List<Guid>();

src/Strata.SqlTools.SqlBreakdown/Utilities/SqlSchemaHelpers.cs

@@ -61,8 +61,8 @@ public static partial class SqlUtils
     /// </summary>
     /// <returns>A list of system schema names.</returns>
     public static List<string> GetSystemSchemas()
-        => new List<string>
-        {
+        =>
+        [
             DEFAULT_SCHEMA,
             "int",      // integration
             "perf",
@@ -73,6 +73,6 @@ public static partial class SqlUtils
             "upg",
             "irc",      // irc chat rooms
             "migration"
-        };
+        ];
 }
 

src/Strata.SqlTools.SqlBreakdown/Utilities/SqlUtils.cs

@@ -450,13 +450,13 @@ public static partial class SqlUtils
     /// </summary>
     /// <returns>An enumerable collection of SQL data types suitable for identity columns.</returns>
     public static IEnumerable<SqlDataType> IdentityColumnTypes()
-        => new List<SqlDataType>
-        {
+        =>
+        [
             SqlDataType.BigInt,
             SqlDataType.TinyInt,
             SqlDataType.Int,
             SqlDataType.SmallInt
-        };
+        ];
 
     /// <summary>
     /// Gets the SQL sort direction string for a given sort direction enumeration.

src/Strata.SqlTools.SqlServer/Breakdowns/ProcedureBreakdown.cs

@@ -20,7 +20,7 @@ public class ProcedureBreakdown : SqlBreakdownBase
     {
         Parser = new StatementParser();
         ProcedureName = new SqlClause();
-        Parameters = new Dictionary<string, string>();
+        Parameters = [];
     }
 
     /// <summary>
@@ -41,7 +41,7 @@ public class ProcedureBreakdown : SqlBreakdownBase
     /// <param name="parameters">The parameters dictionary (parameter name -> value expression).</param>
     public ProcedureBreakdown(string procedureName, Dictionary<string, string> parameters) : this(procedureName)
     {
-        Parameters = parameters ?? new Dictionary<string, string>();
+        Parameters = parameters ?? [];
     }
 
     /// <summary>

src/Strata.SqlTools.SqlServer/Breakdowns/QueryBreakdown.cs

@@ -41,8 +41,8 @@ public class QueryBreakdown : SqlBreakdownBase, IQueryBreakdown
     public QueryBreakdown() : base()
     {
         Parser = new StatementParser();
-        _parameterList = new List<IQueryParam>();
-        _withClauses = new List<IWithClause>();
+        _parameterList = [];
+        _withClauses = [];
 
         // Initialize backing fields directly to avoid triggering cache invalidation
         _selectClause = new SqlExpressionClause(splitOnComma: true);
@@ -117,7 +117,7 @@ public class QueryBreakdown : SqlBreakdownBase, IQueryBreakdown
     /// Gets the parameter dictionary containing parameter names and their values.
     /// Parameter values can be set/updated after parsing.
     /// </summary>
-    public Dictionary<string, object> Parameters { get; } = new Dictionary<string, object>();
+    public Dictionary<string, object> Parameters { get; } = [];
 
     /// <summary>
     /// Gets the WITH clauses (Common Table Expressions) as an ordered list.

src/Strata.SqlTools.SqlServer/Breakdowns/QueryBreakdownCollectionBase.cs

@@ -26,7 +26,7 @@ public abstract class QueryBreakdownCollectionBase<TQuery> : SqlBreakdownCollect
     /// </summary>
     protected QueryBreakdownCollectionBase() : base()
     {
-        QueryBreakdownList = new List<TQuery>();
+        QueryBreakdownList = [];
     }
 
     /// <summary>

src/Strata.SqlTools.SqlServer/Statements/StatementParser.cs

@@ -143,7 +143,7 @@ public class StatementParser
 #pragma warning disable S127 // "for" loop stop conditions should be invariant
     public virtual string ExtractSqlComments(string sql, out List<string> comments)
     {
-        comments = new List<string>();
+        comments = [];
         var result = new StringBuilder();
         var inString = false;
         char stringChar = '\0';