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using System;
 
namespace Testprogramm
{
    public class TestKlasse
    {
        public struct Teststruct
        {
            public bool testbit1=false;
            public bool testbit2=false;           
        };
 
        Teststruct TS = new Teststruct();
 
        public Teststruct AufrufStruct()
        {
            TS.testbit1= true;
            TS.testbit2= true;
            return TS;
        }       
    }    
 
    static class Program: TestKlasse
    {
        /// <summary>
        /// Der Haupteinstiegspunkt für die Anwendung.
        /// </summary>
        [STAThread]
        static void Main()
        {
            TestKlasse TK = new TestKlasse();
            TK.AufrufStruct();
 
            Teststruct TS;
 
            Console.WriteLine("Das Testbit1 hat den Wert", TS.testbit1);            
        }
    }}
 

prog.cs(23,18): error CS0713: Static class `Testprogramm.Program' cannot derive from type `Testprogramm.TestKlasse'. Static classes must derive from object
prog.cs(9,20): error CS0573: 'Testprogramm.TestKlasse.Teststruct': Structs cannot have instance property or field initializers
prog.cs(10,20): error CS0573: 'Testprogramm.TestKlasse.Teststruct': Structs cannot have instance property or field initializers
Compilation failed: 3 error(s), 0 warnings

Standard output is empty