public void Test8()
 {
     Assert.True(Isogram_Problem.Isogram_String("Mark John"));
 }
 public void Test1()
 {
     Assert.True(Isogram_Problem.Isogram_String(""));
 }
 public void Test7()
 {
     Assert.True(Isogram_Problem.Isogram_String("thumbscrew-japingly"));
 }
 public void Test6()
 {
     Assert.True(Isogram_Problem.Isogram_String("Alphabet"));
 }
 public void Test5()
 {
     Assert.True(Isogram_Problem.Isogram_String("subdermatoglyphic"));
 }
 public void Test4()
 {
     Assert.True(Isogram_Problem.Isogram_String("six-year-old"));
 }
 public void Test3()
 {
     Assert.False(Isogram_Problem.Isogram_String("eleven"));
 }