How to generate c# code at run time using c# language

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C#

public void AddConstructor()
        {
            Con = this.VarValue;
            // Declare the constructor
            CodeConstructor constructor = new CodeConstructor();
            constructor.Attributes = MemberAttributes.Public;
            constructor.Parameters.Add(new CodeParameterDeclarationExpression(Type, Con));
            
            CodeFieldReferenceExpression widthReference = new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), Con);

            constructor.Statements.Add(new CodeAssignStatement(widthReference, new CodeArgumentReferenceExpression(Con)));
            
            targetClass.Members.Add(constructor);
        }

Output of this code is

public MyCode(String val)
        {
            this.val = val;
        }

i want only non parameterized Constructor
like this

public MyCode()
        {
            val = "Value";
        }

i tried but didn't get.... plese give me any simple clue to generate c# source code file At runtime using c#...