Running C# function with a class dynamically from a string

Question

I am trying to dynamically execute code on the fly. The code will be in a file but for this example i've added it as a variable (code). I been trying to CSharpScript but all examples i've seen online are just evaluating expressions.

i would like to

-Execute the RunThisMethod with the interface paramter

-if it's possible to only instantiate the MyClass once and reuse it by calling RunThisMethod with different parameters

public interface ITextColumns
{
    int LineIndex { get; set; }
    string[] Columns { get; set; }
}
public class TextColumns : ITextColumns
{
    int ITextColumns.LineIndex { get; set; }
    string[] ITextColumns.Columns { get; set; }
}

class Program
{
    static void Main(string[] args)
    {
        var code = @"using System;
            using System.Collections.Generic;
            using System.Linq;
            using System.Text;
            using System.Threading.Tasks;
            using System.Xml.Linq;

            public class MyClass
            {
                public XElement RunThisMethod(IEnumerable<ITextColumns> textColumns)
                {
                    var result = new XElement(""Root"");
                    RecursiveMethod(result, textColumns);
                    return result;
                }

                private void RecursiveMethod(XElement xElement, IEnumerable<ITextColumns> textColumns)
                {
                    //some logic to tranform textColumns to xElement
                    // will use linq
                }
            }";
        var parameterToPass = Enumerable.Empty<ITextColumns>();
        //Execute the code here
    }
}