Fix CI reflection failures by replacing DynamicInvoke with strongly-typed lambdas

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: yevhen

learnings.md

@@ -126,6 +126,7 @@ This document is organized by topic to consolidate key learnings about the proje
 - **Cross-Platform Path Handling:** MSBuild path handling differences between Windows/Unix require careful attention to separators and absolute vs relative paths
 - **Package Source Discovery:** NuGet source discovery during package testing can fail silently if local feed structure is incorrect - verify with `--verbosity detailed`
 - **DateTime Culture-Dependent Formatting:** DateTime.ToString() produces different output across platforms (macOS: "1/1/2023", Linux: "01/01/2023 00:00:00") - use `dt.ToString("M/d/yyyy", CultureInfo.InvariantCulture)` for consistent cross-platform formatting in error messages
+- **DynamicInvoke Cross-Platform Issues:** Using `Expression.Lambda(expression).Compile().DynamicInvoke()` can fail on CI/certain runtimes with `NotSupportedException: Specified method is not supported` - use strongly-typed `Expression.Lambda<Func<object>>(Expression.Convert(expression, typeof(object))).Compile()()` for direct invocation without reflection
 
 ## String Diffing Implementation (Increment 5)
 

src/SharpAssert.Runtime/Core/ExpressionAnalyzer.cs

@@ -152,11 +152,11 @@ static EvaluationResult AnalyzeMethodCall(MethodCallExpression methodCall, Dicti
     {
         if (!CompiledCache.TryGetValue(expression, out var compiled))
         {
-            compiled = Expression.Lambda(expression).Compile();
+            compiled = Expression.Lambda<Func<object>>(Expression.Convert(expression, typeof(object))).Compile();
             CompiledCache[expression] = compiled;
         }
 
-        return compiled.DynamicInvoke();
+        return ((Func<object>)compiled)();
     }
 
     static bool EvaluateBinaryExpression(ExpressionType nodeType, object? leftValue, object? rightValue) => nodeType switch

src/SharpAssert.Runtime/Features/LinqOperations/LinqOperationFormatter.cs

@@ -136,8 +136,8 @@ static string FormatCollection(object? collection)
 
     static object? GetValue(Expression expression)
     {
-        var compiled = Expression.Lambda(expression).Compile();
-        return compiled.DynamicInvoke();
+        var lambda = Expression.Lambda<Func<object>>(Expression.Convert(expression, typeof(object)));
+        return lambda.Compile()();
     }
 
     static string GetPredicateString(MethodCallExpression methodCall) => 

src/SharpAssert.Runtime/Features/SequenceEqual/SequenceEqualComparer.cs

@@ -171,7 +171,7 @@ static SequenceDiffLine ToDiffLine(string line, IReadOnlyList<object?> firstValu
 
     static object? GetValue(Expression expression)
     {
-        var compiled = Expression.Lambda(expression).Compile();
-        return compiled.DynamicInvoke();
+        var lambda = Expression.Lambda<Func<object>>(Expression.Convert(expression, typeof(object)));
+        return lambda.Compile()();
     }
 }