CSharpCodeProvider override, recompile or replace an existing function by dynamic compilation

Question

I have looked every resources in the net and I could not find any answer!

I want to know if its possible to override or recompile a function in the parent application by Dynamic Compilation, by using C# CSharpCodeProvider.

I have provide a simple pseudocode as shown below.

the Test class is what I want to override or recompile.

class Test 
{
    public virtual void Testing1()
    {
        Console.WriteLine("Method1");
    }
}

What actually I want to do is to dynamically compile the 'source' and override the Test.Testing1. I think my idea has many problems, please guide me.

source= @"
    class Test
{
    public override void Testing1()
    {
        Console.WriteLine(""Method2"");
    }
}
"

     Dictionary<string, string> providerOptions = new Dictionary<string, string>
            {
                {"CompilerVersion", "v4.0"}
            };
        CSharpCodeProvider provider = new CSharpCodeProvider(providerOptions);
        CompilerParameters compilerParams = new CompilerParameters
        {
            GenerateInMemory = true,
            GenerateExecutable = false,
        };
        var assemblies = typeof(Program).Assembly.GetReferencedAssemblies();
        var assemblyLocations = assemblies.Select(a => Assembly.ReflectionOnlyLoad(a.FullName).Location).ToList();
        assemblyLocations.Add(typeof(Program).Assembly.Location);
        compilerParams.ReferencedAssemblies.AddRange(assemblyLocations.ToArray());
        CompilerResults results = provider.CompileAssemblyFromSource(compilerParams, source);

As conclusion, Lets say if I execute the below code before dynamic compilation, the output would be "Method 1".

Test test = new Test();
test.Testing1();

and if I execute the same code after compilation, I want to get "Method 2" as output.