Use Array.Empty where appropriate

src/FluentNHibernate.Testing/DomainModel/Mapping/PropertyPartTester.cs

@@ -565,7 +565,7 @@ public void NullSafeSet(DbCommand cmd, object value, int index, ISessionImplemen
 
         public SqlType[] SqlTypes
         {
-            get { return new SqlType[] {}; }
+            get { return Array.Empty<SqlType>(); }
         }
         public Type ReturnedType => null;
 

src/FluentNHibernate.Testing/FluentInterfaceTests/CustomPersister.cs

@@ -34,17 +34,17 @@ public IType GetPropertyType(string propertyName)
 
     public int[] FindDirty(object[] currentState, object[] previousState, object entity, ISessionImplementor session)
     {
-        return new int[] {};
+        return Array.Empty<int>();
     }
 
     public int[] FindModified(object[] old, object[] current, object entity, ISessionImplementor session)
     {
-        return new int[] {};
+        return Array.Empty<int>();
     }
 
     public object[] GetNaturalIdentifierSnapshot(object id, ISessionImplementor session)
     {
-        return new object[] {};
+        return Array.Empty<object>();
     }
 
     public object Load(object id, object optionalObject, LockMode lockMode, ISessionImplementor session)
@@ -71,7 +71,7 @@ public void Update(object id, object[] fields, int[] dirtyFields, bool hasDirtyC
 
     public object[] GetDatabaseSnapshot(object id, ISessionImplementor session)
     {
-        return new object[] {};
+        return Array.Empty<object>();
     }
 
     public object GetCurrentVersion(object id, ISessionImplementor session)
@@ -112,7 +112,7 @@ public object CreateProxy(object id, ISessionImplementor session)
 
     public object[] GetPropertyValuesToInsert(object obj, IDictionary mergeMap, ISessionImplementor session)
     {
-        return new object[] {};
+        return Array.Empty<object>();
     }
 
     public void ProcessInsertGeneratedProperties(object id, object entity, object[] state, ISessionImplementor session)
@@ -149,7 +149,7 @@ public void SetPropertyValue(object obj, int i, object value, EntityMode entityM
 
     public object[] GetPropertyValues(object obj, EntityMode entityMode)
     {
-        return new object[] {};
+        return Array.Empty<object>();
     }
 
     public object GetPropertyValue(object obj, int i, EntityMode entityMode)
@@ -353,11 +353,11 @@ public IEntityPersister GetSubclassEntityPersister(object instance, ISessionFact
 
     public string[] PropertySpaces
     {
-        get { return new string[] {}; }
+        get { return Array.Empty<string>(); }
     }
     public string[] QuerySpaces
     {
-        get { return new string[] {}; }
+        get { return Array.Empty<string>(); }
     }
     public bool IsMutable => false;
 
@@ -373,49 +373,49 @@ public string[] QuerySpaces
 
     public int[] NaturalIdentifierProperties
     {
-        get { return new int[] {}; }
+        get { return Array.Empty<int>(); }
     }
     public IIdentifierGenerator IdentifierGenerator => null;
 
     public IType[] PropertyTypes
     {
-        get { return new IType[] {}; }
+        get { return Array.Empty<IType>(); }
     }
     public string[] PropertyNames
     {
-        get { return new string[] {}; }
+        get { return Array.Empty<string>(); }
     }
     public bool[] PropertyInsertability
     {
-        get { return new bool[] {}; }
+        get { return Array.Empty<bool>(); }
     }
     public ValueInclusion[] PropertyInsertGenerationInclusions
     {
-        get { return new ValueInclusion[] {}; }
+        get { return Array.Empty<ValueInclusion>(); }
     }
     public ValueInclusion[] PropertyUpdateGenerationInclusions
     {
-        get { return new ValueInclusion[] {}; }
+        get { return Array.Empty<ValueInclusion>(); }
     }
     public bool[] PropertyCheckability
     {
-        get { return new bool[] {}; }
+        get { return Array.Empty<bool>(); }
     }
     public bool[] PropertyNullability
     {
-        get { return new bool[] {}; }
+        get { return Array.Empty<bool>(); }
     }
     public bool[] PropertyVersionability
     {
-        get { return new bool[] {}; }
+        get { return Array.Empty<bool>(); }
     }
     public bool[] PropertyLaziness
     {
-        get { return new bool[] {}; }
+        get { return Array.Empty<bool>(); }
     }
     public CascadeStyle[] PropertyCascadeStyles
     {
-        get { return new CascadeStyle[] {}; }
+        get { return Array.Empty<CascadeStyle>(); }
     }
     public IType IdentifierType => null;
 
@@ -457,7 +457,7 @@ public CascadeStyle[] PropertyCascadeStyles
 
     public bool[] PropertyUpdateability
     {
-        get { return new bool[] {}; }
+        get { return Array.Empty<bool>(); }
     }
     public bool HasCache => false;
 

src/FluentNHibernate/Conventions/DefaultConventionFinder.cs

@@ -150,7 +150,7 @@ private object Instantiate(Type type)
             if (IsFinderConstructor(constructor))
                 instance = constructor.Invoke(new[] { this });
             else if (IsParameterlessConstructor(constructor))
-                instance = constructor.Invoke(new object[] { });
+                instance = constructor.Invoke(Array.Empty<object>());
         }
 
         return instance;