Add the option OptionCanDeclareMultiExpressionsLambdaInSimpleExpressionEvaluate default value is true

Author: codingseb

CodingSeb.ExpressionEvaluator/ExpressionEvaluator.cs

@@ -860,6 +860,13 @@ public bool OptionNewFunctionEvaluationActive
         /// </summary>
         public bool OptionDetectExtensionMethodsOverloadsOnExtensionMethodNotFound { get; set; } = true;
 
+        /// <summary>
+        /// If <c>true</c> Allow to define multi expression lambda in Expressions (not in script)<para/>
+        /// If <c>false</c> Can only define simple expression lambda if not in script
+        /// <para>Default value : <c>true</c></para>
+        /// </summary>
+        public bool OptionCanDeclareMultiExpressionsLambdaInSimpleExpressionEvaluate { get; set; } = true;
+
         #endregion
 
         #region Reflection flags
@@ -3096,6 +3103,8 @@ protected virtual bool GetLambdaExpression(string expression, Stack<object> stac
                     .Cast<Match>().ToList()
                     .ConvertAll(argMatch => argMatch.Value);
 
+                bool inScriptAtDeclaration = inScript;
+
                 stack.Push(new InternalDelegate((object[] args) =>
                 {
                     var vars = new Dictionary<string, object>(variables);
@@ -3112,10 +3121,10 @@ protected virtual bool GetLambdaExpression(string expression, Stack<object> stac
 
                     object result = null;
 
-                    if (inScript && lambdaBody.StartsWith("{") && lambdaBody.EndsWith("}"))
+                    if ((OptionCanDeclareMultiExpressionsLambdaInSimpleExpressionEvaluate || inScriptAtDeclaration) 
+                        && lambdaBody.StartsWith("{") && lambdaBody.EndsWith("}"))
                     {
                         result = ScriptEvaluate(lambdaBody.Substring(1, lambdaBody.Length - 2));
-                        inScript = true;
                     }
                     else
                     {