Optimize some double lookups on Dictionary (#691)

+semver:patch

Author: hazzik

src/FluentNHibernate/Conventions/Inspections/InspectorModelMapper.cs

@@ -7,7 +7,7 @@ namespace FluentNHibernate.Conventions.Inspections;
 
 public class InspectorModelMapper<TInspector, TMapping>
 {
-    readonly IDictionary<string, string> mappings = new Dictionary<string, string>();
+    readonly Dictionary<string, string> mappings = new();
 
     public void Map(Expression<Func<TInspector, object>> inspectorProperty, Expression<Func<TMapping, object>> mappingProperty)
     {
@@ -26,8 +26,8 @@ void Map(Member inspectorProperty, Expression<Func<TMapping, object>> mappingPro
 
     public string Get(Member property)
     {
-        if (mappings.ContainsKey(property.Name))
-            return mappings[property.Name];
+        if (mappings.TryGetValue(property.Name, out var mapping))
+            return mapping;
 
         return property.Name;
     }

src/FluentNHibernate/Infrastructure/Container.cs

@@ -5,7 +5,7 @@ namespace FluentNHibernate.Infrastructure;
 
 public class Container
 {
-    readonly IDictionary<Type, Func<Container, object>> registeredTypes = new Dictionary<Type, Func<Container, object>>();
+    readonly Dictionary<Type, Func<Container, object>> registeredTypes = new();
 
     public void Register<T>(Func<Container, object> instantiateFunc)
     {
@@ -14,10 +14,8 @@ public void Register<T>(Func<Container, object> instantiateFunc)
 
     public object Resolve(Type type)
     {
-        if (!registeredTypes.ContainsKey(type))
+        if (!registeredTypes.TryGetValue(type, out var instantiationFunc))
             throw new ResolveException(type);
-            
-        var instantiationFunc = registeredTypes[type];
 
         return instantiationFunc(this);
     }