Generate Class Create Instance.cs

Generate Class Create Instance.cs

using System;
using System.CodeDom.Compiler;
using System.Reflection;

class Program
{
    static void Main()
    {
        string code = "public class Person { public int Id {get; set;} public string UserName {get; set;} }";
        
        // Compile the code
        CompilerResults results = CompileCode(code);

        if (results.Errors.Count == 0)
        {
            // The code compiled successfully, so create an instance of the generated class
            object instance = CreateInstance(results.CompiledAssembly, "Person");

            if (instance != null)
            {
                // Use reflection to access the properties
                PropertyInfo idProperty = instance.GetType().GetProperty("Id");
                PropertyInfo userNameProperty = instance.GetType().GetProperty("UserName");

                // Set property values
                idProperty.SetValue(instance, 1);
                userNameProperty.SetValue(instance, "JohnDoe");

                // Display property values
                Console.WriteLine($"Id: {idProperty.GetValue(instance)}");
                Console.WriteLine($"UserName: {userNameProperty.GetValue(instance)}");
            }
        }
        else
        {
            // Display compilation errors
            foreach (CompilerError error in results.Errors)
            {
                Console.WriteLine(error.ErrorText);
            }
        }
    }

    static CompilerResults CompileCode(string code)
    {
        CodeDomProvider codeProvider = CodeDomProvider.CreateProvider("CSharp");

        CompilerParameters compilerParams = new CompilerParameters
        {
            GenerateInMemory = true,
            GenerateExecutable = false
        };

        return codeProvider.CompileAssemblyFromSource(compilerParams, code);
    }

    static object CreateInstance(Assembly assembly, string className)
    {
        Type type = assembly.GetType(className);
        if (type != null)
        {
            return Activator.CreateInstance(type);
        }
        return null;
    }
}