diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c1ce981..75f34c2b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to this project will be documented in this file.
 
+## [5.0.1]
+- Added option to disable automatic type registry for input parameters in reSettings
+- Added option to make expression case sensitive in reSettings
+
 ## [5.0.0]
 - Fixed security bug related to System.Dynamic.Linq.Core
 
diff --git a/src/RulesEngine/ExpressionBuilders/RuleExpressionParser.cs b/src/RulesEngine/ExpressionBuilders/RuleExpressionParser.cs
index 8570fdbb..3d169190 100644
--- a/src/RulesEngine/ExpressionBuilders/RuleExpressionParser.cs
+++ b/src/RulesEngine/ExpressionBuilders/RuleExpressionParser.cs
@@ -17,15 +17,11 @@ namespace RulesEngine.ExpressionBuilders
     public class RuleExpressionParser
     {
         private readonly ReSettings _reSettings;
-        private static MemCache _memoryCache;
         private readonly IDictionary<string, MethodInfo> _methodInfo;
 
         public RuleExpressionParser(ReSettings reSettings)
         {
             _reSettings = reSettings;
-            _memoryCache = _memoryCache ?? new MemCache(new MemCacheConfig {
-                SizeLimit = 1000
-            });
             _methodInfo = new Dictionary<string, MethodInfo>();
             PopulateMethodInfo();
         }
@@ -38,7 +34,8 @@ private void PopulateMethodInfo()
         public Expression Parse(string expression, ParameterExpression[] parameters, Type returnType)
         {
             var config = new ParsingConfig { 
-                CustomTypeProvider = new CustomTypeProvider(_reSettings.CustomTypes)
+                CustomTypeProvider = new CustomTypeProvider(_reSettings.CustomTypes),
+                IsCaseSensitive = _reSettings.IsExpressionCaseSensitive
             };
             return new ExpressionParser(parameters, expression, new object[] { }, config).Parse(returnType);
 
@@ -51,19 +48,17 @@ public Func<object[], T> Compile<T>(string expression, RuleParameter[] ruleParam
             {
                 rtype = null;
             }
-            var cacheKey = GetCacheKey(expression, ruleParams, typeof(T));
-            return _memoryCache.GetOrCreate(cacheKey, () => {
-                var parameterExpressions = GetParameterExpression(ruleParams).ToArray();
+            var parameterExpressions = GetParameterExpression(ruleParams).ToArray();
             
-                var e = Parse(expression, parameterExpressions, rtype);
-                if(rtype == null)
-                {
-                    e = Expression.Convert(e, typeof(T));
-                }
-                var expressionBody = new List<Expression>() { e };
-                var wrappedExpression = WrapExpression<T>(expressionBody, parameterExpressions, new ParameterExpression[] { });
-                return wrappedExpression.CompileFast();
-            });
+            var e = Parse(expression, parameterExpressions, rtype);
+            if(rtype == null)
+            {
+                e = Expression.Convert(e, typeof(T));
+            }
+            var expressionBody = new List<Expression>() { e };
+            var wrappedExpression = WrapExpression<T>(expressionBody, parameterExpressions, new ParameterExpression[] { });
+            return wrappedExpression.CompileFast();
+
         }
 
         private Expression<Func<object[], T>> WrapExpression<T>(List<Expression> expressionList, ParameterExpression[] parameters, ParameterExpression[] variables)
@@ -155,13 +150,5 @@ private Expression<Func<object[],Dictionary<string,object>>> CreateDictionaryExp
 
             return WrapExpression<Dictionary<string,object>>(body, paramExp.ToArray(), variableExp.ToArray());
         }
-
-        private string GetCacheKey(string expression, RuleParameter[] ruleParameters, Type returnType)
-        {
-            var paramKey = string.Join("|", ruleParameters.Select(c => c.Name + "_" + c.Type.ToString()));
-            var returnTypeKey = returnType?.ToString() ?? "null";
-            var combined = $"Expression:{expression}-Params:{paramKey}-ReturnType:{returnTypeKey}";
-            return combined;
-        }
     }
 }
diff --git a/src/RulesEngine/Models/ReSettings.cs b/src/RulesEngine/Models/ReSettings.cs
index 8589092e..7a133ea6 100644
--- a/src/RulesEngine/Models/ReSettings.cs
+++ b/src/RulesEngine/Models/ReSettings.cs
@@ -12,7 +12,6 @@ namespace RulesEngine.Models
     [ExcludeFromCodeCoverage]
     public class ReSettings
     {
-
         public ReSettings() { }
 
         // create a copy of settings
@@ -26,7 +25,9 @@ internal ReSettings(ReSettings reSettings)
             EnableScopedParams = reSettings.EnableScopedParams;
             NestedRuleExecutionMode = reSettings.NestedRuleExecutionMode;
             CacheConfig = reSettings.CacheConfig;
-        }
+            IsExpressionCaseSensitive = reSettings.IsExpressionCaseSensitive;
+            AutoRegisterInputType = reSettings.AutoRegisterInputType;
+    }
 
 
         /// <summary>
@@ -62,6 +63,17 @@ internal ReSettings(ReSettings reSettings)
         /// </summary>
         public bool EnableScopedParams { get; set; } = true;
 
+        /// <summary>
+        /// Sets whether expression are case sensitive
+        /// </summary>
+        public bool IsExpressionCaseSensitive { get; set; } = false;
+
+        /// <summary>
+        /// Auto Registers input type in Custom Type to allow calling method on type.
+        /// Default : true
+        /// </summary>
+        public bool AutoRegisterInputType { get; set; } = true;
+
         /// <summary>
         /// Sets the mode for Nested rule execution, Default: All
         /// </summary>
diff --git a/src/RulesEngine/RuleCompiler.cs b/src/RulesEngine/RuleCompiler.cs
index d05bce88..4a036039 100644
--- a/src/RulesEngine/RuleCompiler.cs
+++ b/src/RulesEngine/RuleCompiler.cs
@@ -241,7 +241,7 @@ private RuleFunc<RuleResultTree> GetWrappedRuleFunc(Rule rule, RuleFunc<RuleResu
             {
                 return ruleFunc;
             }
-            var paramDelegate = GetExpressionBuilder(rule.RuleExpressionType).CompileScopedParams(ruleParameters, ruleExpParams);
+            var paramDelegate = CompileScopedParams(rule.RuleExpressionType,ruleParameters, ruleExpParams);
 
             return (ruleParams) => {
                 var inputs = ruleParams.Select(c => c.Value).ToArray();
diff --git a/src/RulesEngine/RulesEngine.cs b/src/RulesEngine/RulesEngine.cs
index 9002f82e..66cd352b 100644
--- a/src/RulesEngine/RulesEngine.cs
+++ b/src/RulesEngine/RulesEngine.cs
@@ -287,7 +287,10 @@ private bool RegisterRule(string workflowName, params RuleParameter[] ruleParams
             if (workflow != null)
             {
                 var dictFunc = new Dictionary<string, RuleFunc<RuleResultTree>>();
-                _reSettings.CustomTypes = _reSettings.CustomTypes.Safe().Union(ruleParams.Select(c => c.Type)).ToArray();
+                if (_reSettings.AutoRegisterInputType)
+                {
+                    _reSettings.CustomTypes = _reSettings.CustomTypes.Safe().Union(ruleParams.Select(c => c.Type)).ToArray();
+                }
                 // add separate compilation for global params
 
                 var globalParamExp = new Lazy<RuleExpressionParameter[]>(
diff --git a/src/RulesEngine/RulesEngine.csproj b/src/RulesEngine/RulesEngine.csproj
index 80f3998f..77879a4e 100644
--- a/src/RulesEngine/RulesEngine.csproj
+++ b/src/RulesEngine/RulesEngine.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net6.0;netstandard2.0</TargetFrameworks>
-    <Version>5.0.0</Version>
+    <Version>5.0.1</Version>
     <Copyright>Copyright (c) Microsoft Corporation.</Copyright>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <PackageProjectUrl>https://github.com/microsoft/RulesEngine</PackageProjectUrl>
diff --git a/test/RulesEngine.UnitTest/ActionTests/MockClass/ReturnContextAction.cs b/test/RulesEngine.UnitTest/ActionTests/MockClass/ReturnContextAction.cs
index 174a8490..3ee98c30 100644
--- a/test/RulesEngine.UnitTest/ActionTests/MockClass/ReturnContextAction.cs
+++ b/test/RulesEngine.UnitTest/ActionTests/MockClass/ReturnContextAction.cs
@@ -5,11 +5,13 @@
 using RulesEngine.Models;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace RulesEngine.UnitTest.ActionTests.MockClass
 {
+    [ExcludeFromCodeCoverage]
     public class ReturnContextAction : ActionBase
     {
         public override ValueTask<object> Run(ActionContext context, RuleParameter[] ruleParameters)
diff --git a/test/RulesEngine.UnitTest/BusinessRuleEngineTest.cs b/test/RulesEngine.UnitTest/BusinessRuleEngineTest.cs
index 521741df..93b7aac5 100644
--- a/test/RulesEngine.UnitTest/BusinessRuleEngineTest.cs
+++ b/test/RulesEngine.UnitTest/BusinessRuleEngineTest.cs
@@ -254,6 +254,23 @@ public void RulesEngine_New_IncorrectJSON_ThrowsException()
         }
 
 
+        [Fact]
+        public void RulesEngine_AddOrUpdate_IncorrectJSON_ThrowsException()
+        {
+            Assert.Throws<RuleValidationException>(() => {
+                var workflow = new Workflow();
+                var re = new RulesEngine();
+                re.AddOrUpdateWorkflow(workflow);
+            });
+
+            Assert.Throws<RuleValidationException>(() => {
+                var workflow = new Workflow() { WorkflowName = "test" };
+                var re = new RulesEngine();
+                re.AddOrUpdateWorkflow(workflow);
+            });
+        }
+
+
         [Theory]
         [InlineData("rules1.json")]
         public async Task ExecuteRule_InvalidWorkFlow_ThrowsException(string ruleFileName)
diff --git a/test/RulesEngine.UnitTest/CaseSensitiveTests.cs b/test/RulesEngine.UnitTest/CaseSensitiveTests.cs
new file mode 100644
index 00000000..8f123038
--- /dev/null
+++ b/test/RulesEngine.UnitTest/CaseSensitiveTests.cs
@@ -0,0 +1,50 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using RulesEngine.Models;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace RulesEngine.UnitTest
+{
+    [ExcludeFromCodeCoverage]
+    public class CaseSensitiveTests
+    {
+        [Theory]
+        [InlineData(true,true,false)]
+        [InlineData(false,true,true)]
+
+        public async Task CaseSensitiveTest(bool caseSensitive, bool expected1, bool expected2)
+        {
+            var reSettings = new ReSettings {
+                IsExpressionCaseSensitive = caseSensitive
+            };
+
+
+            var worflow = new Workflow {
+                WorkflowName = "CaseSensitivityTest",
+                Rules = new[] {
+                    new Rule {
+                        RuleName = "check same case1",
+                        Expression = "input1 == \"hello\""
+                    },
+                    new Rule {
+                        RuleName = "check same case2",
+                        Expression = "INPUT1 == \"hello\""
+                    }
+                }
+            };
+
+            var re = new RulesEngine(new[] { worflow }, reSettings);
+            var result = await re.ExecuteAllRulesAsync("CaseSensitivityTest", "hello");
+
+            Assert.Equal(expected1, result[0].IsSuccess);
+            Assert.Equal(expected2, result[1].IsSuccess);
+        }
+    }
+}
diff --git a/test/RulesEngine.UnitTest/TestData/rules4.json b/test/RulesEngine.UnitTest/TestData/rules4.json
index 4f11a8f8..63bb1ca0 100644
--- a/test/RulesEngine.UnitTest/TestData/rules4.json
+++ b/test/RulesEngine.UnitTest/TestData/rules4.json
@@ -40,7 +40,7 @@
       {
         "RuleName": "GiveDiscount25",
         "SuccessEvent": "25",
-        "ErrorMessage": "One or more adjust rules failed, country : $(input4.country), loyaltyFactor : $(input4.loyaltyFactor), totalPurchasesToDate : $(input4.totalPurchasesToDate), totalOrders : $(input5.totalOrders), noOfVisitsPerMonth : $(input30.noOfVisitsPerMonth)",
+        "ErrorMessage": "One or more adjust rules failed, country : $(input4.country), loyaltyFactor : $(input4.loyaltyFactor), totalPurchasesToDate : $(input4.totalPurchasesToDate), totalOrders : $(input5.totalOrders), noOfVisitsPerMonth : $(input30.noOfVisitsPerMonth), $(model2)",
         "ErrorType": "Error",
         "localParams": [
           {
diff --git a/test/RulesEngine.UnitTest/TypedClassTests.cs b/test/RulesEngine.UnitTest/TypedClassTests.cs
new file mode 100644
index 00000000..bb1fd130
--- /dev/null
+++ b/test/RulesEngine.UnitTest/TypedClassTests.cs
@@ -0,0 +1,88 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using RulesEngine.Models;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace RulesEngine.UnitTest
+{
+    [Trait("Category", "Unit")]
+    [ExcludeFromCodeCoverage]
+    public class TypedClassTests
+    {
+        public class Transazione
+        {
+            public List<Attore> Attori { get; set; } = new();
+        }
+        public class Attore
+        {
+            public Guid Id { get; internal set; }
+            public string Nome { get; internal set; }
+            public RuoloAttore RuoloAttore { get; internal set; }
+        }
+
+        public enum RuoloAttore
+        {
+            A,
+            B,
+            C
+        }
+
+        [Fact]
+        public async Task TypedClassTest()
+        {
+            Workflow workflow = new() {
+                WorkflowName = "Conferimento",
+                Rules = new Rule[] {
+                    new() {
+                        RuleName = "Attore Da",
+                        Enabled = true,
+                        ErrorMessage = "Attore Da Id must be defined",
+                        SuccessEvent = "10",
+                        RuleExpressionType = RuleExpressionType.LambdaExpression,
+                        Expression = "transazione.Attori.Any(a => a.RuoloAttore == 1)",
+                    },
+                    new() {
+                        RuleName = "Attore A",
+                        Enabled = true,
+                        ErrorMessage = "Attore A must be defined",
+                        SuccessEvent = "10",
+                        RuleExpressionType = RuleExpressionType.LambdaExpression,
+                        Expression = "transazione.Attori != null",
+                    },
+                }
+            };
+            var reSettings = new ReSettings() {
+                CustomTypes = new Type[] {
+                },
+                AutoRegisterInputType = false
+            };
+            var re = new RulesEngine(reSettings);
+            re.AddWorkflow(workflow);
+
+            var param = new Transazione {
+                    Attori = new List<Attore>{
+                    new Attore{
+                        RuoloAttore = RuoloAttore.B,
+                   
+                    },
+                    new Attore {
+                         RuoloAttore = RuoloAttore.C
+                    }
+                }
+
+            };
+
+            var result = await  re.ExecuteAllRulesAsync("Conferimento", new RuleParameter("transazione", param));
+
+            Assert.All(result, (res) => Assert.True(res.IsSuccess));
+
+        }
+    }
+}