Partial C# Class for T4 Templates

partial-class-for-t4-templates.cs

public partial class MessageReceivedTemplate
{
    private TemplateModel Model { get; set; }

    public MessageReceivedTemplate(string name)
    {
        Model = new TemplateModel()
        {
            Name = name,
        };
    }

    private class TemplateModel
    {
        public string Name { get; set; }
    }
}