diff --git a/ArchUnitNET/Domain/GenericParameter.cs b/ArchUnitNET/Domain/GenericParameter.cs
index 17bb8b15a..d71391359 100644
--- a/ArchUnitNET/Domain/GenericParameter.cs
+++ b/ArchUnitNET/Domain/GenericParameter.cs
@@ -8,24 +8,22 @@ namespace ArchUnitNET.Domain
 {
     public class GenericParameter : IType
     {
+        private readonly string _declarerFullName;
         internal readonly IEnumerable<ITypeInstance<IType>> TypeInstanceConstraints;
 
         public GenericParameter(
-            ITypeInstance<IType> declaringTypeInstance,
-            [CanBeNull] MethodMemberInstance declaringMethodInstance,
-            string fullName,
+            string declarerFullName,
             string name,
             GenericParameterVariance variance,
             IEnumerable<ITypeInstance<IType>> typeConstraints,
             bool hasReferenceTypeConstraint,
             bool hasNotNullableValueTypeConstraint,
             bool hasDefaultConstructorConstraint,
-            bool isCompilerGenerated
+            bool isCompilerGenerated,
+            bool declarerIsMethod
         )
         {
-            DeclaringTypeInstance = declaringTypeInstance;
-            DeclaringMethodInstance = declaringMethodInstance;
-            FullName = fullName;
+            _declarerFullName = declarerFullName;
             Name = name;
             Variance = variance;
             TypeInstanceConstraints = typeConstraints;
@@ -33,17 +31,14 @@ bool isCompilerGenerated
             HasNotNullableValueTypeConstraint = hasNotNullableValueTypeConstraint;
             HasDefaultConstructorConstraint = hasDefaultConstructorConstraint;
             IsCompilerGenerated = isCompilerGenerated;
+            DeclarerIsMethod = declarerIsMethod;
         }
 
-        public ITypeInstance<IType> DeclaringTypeInstance { get; }
-        public IType DeclaringType => DeclaringTypeInstance.Type;
+        public IType DeclaringType { get; private set; }
 
         [CanBeNull]
-        public MethodMemberInstance DeclaringMethodInstance { get; }
-
-        [CanBeNull]
-        public IMember DeclaringMethod => DeclaringMethodInstance?.Member;
-        public bool DeclarerIsMethod => DeclaringMethodInstance != null;
+        public IMember DeclaringMethod { get; private set; }
+        public bool DeclarerIsMethod { get; }
         public GenericParameterVariance Variance { get; }
         public IEnumerable<IType> TypeConstraints =>
             TypeInstanceConstraints.Select(instance => instance.Type);
@@ -58,7 +53,7 @@ bool isCompilerGenerated
             || TypeConstraints.Any();
 
         public string Name { get; }
-        public string FullName { get; }
+        public string FullName => _declarerFullName + "+<" + Name + ">";
         public string AssemblyQualifiedName =>
             System.Reflection.Assembly.CreateQualifiedName(
                 DeclaringType.Assembly.FullName,
@@ -83,6 +78,27 @@ bool isCompilerGenerated
         public bool IsNested => true;
         public bool IsStub => true;
 
+        internal void AssignDeclarer(IMember declaringMethod)
+        {
+            if (!declaringMethod.FullName.Equals(_declarerFullName))
+            {
+                throw new InvalidOperationException("Full name of declaring member doesn't match.");
+            }
+
+            DeclaringType = declaringMethod.DeclaringType;
+            DeclaringMethod = declaringMethod;
+        }
+
+        internal void AssignDeclarer(IType declaringType)
+        {
+            if (!declaringType.FullName.Equals(_declarerFullName))
+            {
+                throw new InvalidOperationException("Full name of declaring type doesn't match.");
+            }
+
+            DeclaringType = declaringType;
+        }
+
         public bool Equals(GenericParameter other)
         {
             if (ReferenceEquals(null, other))
diff --git a/ArchUnitNET/Loader/LoadTasks/AddGenericParameterDependencies.cs b/ArchUnitNET/Loader/LoadTasks/AddGenericParameterDependencies.cs
index 4b12271de..fc9ed1ae4 100644
--- a/ArchUnitNET/Loader/LoadTasks/AddGenericParameterDependencies.cs
+++ b/ArchUnitNET/Loader/LoadTasks/AddGenericParameterDependencies.cs
@@ -24,6 +24,7 @@ private void AddTypeGenericParameterDependencies()
         {
             foreach (var genericParameter in _type.GenericParameters)
             {
+                genericParameter.AssignDeclarer(_type);
                 foreach (var typeInstanceConstraint in genericParameter.TypeInstanceConstraints)
                 {
                     var dependency = new TypeGenericParameterTypeConstraintDependency(
@@ -41,6 +42,7 @@ private void AddMemberGenericParameterDependencies()
             {
                 foreach (var genericParameter in member.GenericParameters)
                 {
+                    genericParameter.AssignDeclarer(member);
                     foreach (var typeInstanceConstraint in genericParameter.TypeInstanceConstraints)
                     {
                         var dependency = new MemberGenericParameterTypeConstraintDependency(
diff --git a/ArchUnitNET/Loader/TypeFactory.cs b/ArchUnitNET/Loader/TypeFactory.cs
index 07c9530f8..0745b7f12 100644
--- a/ArchUnitNET/Loader/TypeFactory.cs
+++ b/ArchUnitNET/Loader/TypeFactory.cs
@@ -130,31 +130,37 @@ TypeReference typeReference
         {
             var genericParameter = (Mono.Cecil.GenericParameter)typeReference;
             var declarerIsMethod = genericParameter.Type == GenericParameterType.Method;
-            var declaringType = GetOrCreateStubTypeInstanceFromTypeReference(
-                declarerIsMethod
-                    ? genericParameter.DeclaringMethod.DeclaringType
-                    : genericParameter.DeclaringType
-            );
-            var declaringMethod = declarerIsMethod
-                ? GetOrCreateMethodMemberFromMethodReference(
-                    declaringType,
-                    genericParameter.DeclaringMethod
-                )
-                : null;
-            var declarerFullName =
-                declaringMethod != null
-                    ? declaringMethod.Member.FullName
-                    : declaringType.Type.FullName;
+            var declarerFullName = declarerIsMethod
+                ? genericParameter.DeclaringMethod.BuildFullName()
+                : genericParameter.DeclaringType.BuildFullName();
+            var declaringTypeAssemblyName = declarerIsMethod
+                ? genericParameter.DeclaringMethod.DeclaringType.Module.Assembly.FullName
+                : genericParameter.DeclaringType.Module.Assembly.FullName;
             var assemblyQualifiedName = System.Reflection.Assembly.CreateQualifiedName(
-                declaringType.Type.Assembly.FullName,
+                declaringTypeAssemblyName,
                 $"{declarerFullName}+<{genericParameter.Name}>"
             );
             if (_allTypes.TryGetValue(assemblyQualifiedName, out var existingTypeInstance))
             {
                 return existingTypeInstance;
             }
+            var isCompilerGenerated = genericParameter.IsCompilerGenerated();
+            var variance = genericParameter.GetVariance();
+            var typeConstraints = genericParameter.Constraints.Select(con =>
+                GetOrCreateStubTypeInstanceFromTypeReference(con.ConstraintType)
+            );
             var result = new TypeInstance<GenericParameter>(
-                CreateGenericParameter(genericParameter, declaringType, declaringMethod)
+                new GenericParameter(
+                    declarerFullName,
+                    genericParameter.Name,
+                    variance,
+                    typeConstraints,
+                    genericParameter.HasReferenceTypeConstraint,
+                    genericParameter.HasNotNullableValueTypeConstraint,
+                    genericParameter.HasDefaultConstructorConstraint,
+                    isCompilerGenerated,
+                    declarerIsMethod
+                )
             );
             _allTypes.Add(assemblyQualifiedName, result);
             return result;
@@ -199,7 +205,7 @@ TypeReference typeReference
             } while (elementType.IsArray);
             var elementTypeInstance = GetOrCreateStubTypeInstanceFromTypeReference(elementType);
             var assemblyQualifiedName = System.Reflection.Assembly.CreateQualifiedName(
-                elementTypeInstance.Type.Assembly.FullName,
+                elementTypeInstance.Type.Assembly?.FullName ?? "",
                 typeReference.BuildFullName()
             );
             if (_allTypes.TryGetValue(assemblyQualifiedName, out var existingTypeInstance))
@@ -609,35 +615,6 @@ IGenericParameterProvider genericParameterProvider
                     .Cast<GenericParameter>();
         }
 
-        private GenericParameter CreateGenericParameter(
-            Mono.Cecil.GenericParameter genericParameter,
-            ITypeInstance<IType> declaringTypeInstance,
-            [CanBeNull] MethodMemberInstance declaringMethodInstance
-        )
-        {
-            var isCompilerGenerated = genericParameter.IsCompilerGenerated();
-            var variance = genericParameter.GetVariance();
-            var typeConstraints = genericParameter.Constraints.Select(con =>
-                GetOrCreateStubTypeInstanceFromTypeReference(con.ConstraintType)
-            );
-            var declarerFullName =
-                declaringMethodInstance != null
-                    ? declaringMethodInstance.Member.FullName
-                    : declaringTypeInstance.Type.FullName;
-            return new GenericParameter(
-                declaringTypeInstance,
-                declaringMethodInstance,
-                $"{declarerFullName}+<{genericParameter.Name}>",
-                genericParameter.Name,
-                variance,
-                typeConstraints,
-                genericParameter.HasReferenceTypeConstraint,
-                genericParameter.HasNotNullableValueTypeConstraint,
-                genericParameter.HasDefaultConstructorConstraint,
-                isCompilerGenerated
-            );
-        }
-
         internal GenericArgument CreateGenericArgumentFromTypeReference(TypeReference typeReference)
         {
             return new GenericArgument(GetOrCreateStubTypeInstanceFromTypeReference(typeReference));
diff --git a/TestAssemblies/DependencyAssembly/TypeDependency.cs b/TestAssemblies/DependencyAssembly/TypeDependency.cs
index 748df2d66..49b61f880 100644
--- a/TestAssemblies/DependencyAssembly/TypeDependency.cs
+++ b/TestAssemblies/DependencyAssembly/TypeDependency.cs
@@ -43,3 +43,18 @@ public class ChildClassOfGeneric : GenericBaseClass<ChildClassOfGeneric> { }
 public class ClassWithoutDependencies { }
 
 public class OtherClassWithoutDependencies { }
+
+// https://github.com/TNG/ArchUnitNET/issues/351
+class Issue351
+{
+    public void OuterFunc()
+    {
+        LocalFunc<string>();
+
+        void LocalFunc<T>()
+        {
+            var list = new List<string>();
+            list.GroupBy(x => x).ToDictionary(g => g.Key, g => (IReadOnlyCollection<T>)g.ToList());
+        }
+    }
+}