.NET (Core and Framework)

Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US", false);

public class kokoControl<t> : UserControl 
{
      .....
}
</t>

public class LinqFilter<T> 
{
     some of :
     public Fun<T,bool> GetFilter()
        {
              //here i will return 
              Expression Filter ; 
              Filter = Expression.And(.....) 
              ..............................
              var predicate = Expression.Lambda. .... .
              return (Func<T,bool> )predicate.Compile();
        }
}

public Class FilterControl<T> : UserControl
{
      LinqFilter<T> F;
      ................
}

public class Base<t>
{
	public Func<t,> GetFilter()
	{
		return delegate(T t) { return true; };
	}
}

public class BaseCotnrol<t> : UserControl
{
	Base<t> foo;
}</t></t></t>

public class LinqFilter<T> 
{
     public Fun<T,bool> GetFilter()
        {
              // in this function I made an Expression Tree after 
              // that i make lambda expression that return delegate 
              // this is not important for my problem
              // but I said that just to not write empty function .
              var predicate = Expression.Lambda. .... .
              return (Func<T,bool> )predicate.Compile();
        }
}

public Class FilterControl<font color="red"><T></font> : UserControl
{
      LinqFilter<T> F;
      ................
}

t <- assign some resolved Type
create an instance of FilterControl<t> dynamically and bind t to T
put the instance of FilterControl`1 on your form</t>