Reflection Emit: How to generate getter for comparision

I have problem in generating getterMethod for HasChildren Property in following code.

Could someone help me out of it?

Code in c#

 public class Sample
{       
    public ObservableCollection<Sample> Children { get; set; }    
    public bool HasChildren  { get { return Children?.Count() > 0; } }          
}

Code which is not working is quoted here for methodbuilder.

        const string propertyName = "HasChildren";
        string getterName = $"get_{propertyName}";

        MethodInfo countMethodInfo = typeof(System.Linq.Enumerable).GetMethods().Single(method => method.Name == "Count" && method.IsStatic && method.GetParameters().Length == 1);
        MethodBuilder getHasChildrenMethod = typeBuilder.DefineMethod(getterName, DynamicMethodBuilder.GetMethodAttrs, propertyBuilder.PropertyType, Type.EmptyTypes);
        var il = getHasChildrenMethod.GetILGenerator();         
        var getChildrentMethod = DynamicMethodBuilder.GetGetMethodBuilder(referenceProperty);
        il.Emit(OpCodes.Ldarg_0);
        il.Emit(OpCodes.Call, getChildrentMethod);  //getter for Children        
        il.Emit(OpCodes.Ldc_I4_0); //push 0
        il.Emit(OpCodes.Callvirt, countMethodInfo); //call count method
        il.Emit(OpCodes.Ldc_I4_0);
        il.Emit(OpCodes.Cgt);
        il.Emit(OpCodes.Stloc_0);
        il.Emit(OpCodes.Br_S);
        il.Emit(OpCodes.Ldloc_0);
        il.Emit(OpCodes.Ret);
        propertyBuilder.SetGetMethod(getHasChildrenMethod);

Thanks in advance.