To check if OrderedDictionary collection contains a specific key, the code is as follows −Example Live Demousing System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main(){       OrderedDictionary dict = new OrderedDictionary();       dict.Add("1", "One");       dict.Add("2", "Two");       dict.Add("3", "Three");       dict.Add("4", "Four");       dict.Add("5", "Five");       dict.Add("6", "Six");       dict.Add("7", "Seven");       dict.Add("8", "Eight");       ICollection col = dict.Values;       String[] strVal = new String[dict.Count];       col.CopyTo(strVal, 0);     ... Read More

To get the hash code for this instance, the code is as follows −Example Live Demousing System; public class Demo {    public static void Main() {       string[] arr = {"tom", "amit", "kevin", "katie"};       Type t1 = arr.GetType();       Type t2 = t1.GetElementType();       Console.WriteLine("Type = "+t2.ToString());       Console.WriteLine("Hash Code = "+t1.GetHashCode());    } }OutputThis will produce the following output −Type = System.String Hash Code = 9144789ExampleLet us see another example − Live Demousing System; public class Demo {    enum Vehicle {Car, Bus, Bike, Airplane}    public static void ... Read More

To add an element into the Hashtable, the code is as follows −Example Live Demousing System; using System.Collections; public class Demo {    public static void Main(){       Hashtable hash = new Hashtable(10);       hash.Add("1", "A");       hash.Add("2", "B");       hash.Add("3", "C");       hash.Add("4", "D");       hash.Add("5", "E");       hash.Add("6", "F");       hash.Add("7", "G");       hash.Add("8", "H");       hash.Add("9", "I");       hash.Add("10", "J");       Console.WriteLine("Hashtable Key and Value pairs...");       foreach(DictionaryEntry entry in hash){   ... Read More

To get a specific field of the current type in C#, the code is as follows −Example Live Demousing System; using System.Reflection; public class Demo {    public static void Main() {    Type type = typeof(Subject);       try {          FieldInfo fieldInfo = type.GetField("SubName");          Console.WriteLine("FieldInfo = {0}", fieldInfo);       }       catch (ArgumentNullException e) {          Console.Write("{0}", e.GetType(), e.Message);       }    } } public class Subject {    public string SubName = "Science"; }OutputThis will produce the following output −FieldInfo = ... Read More

To add the specified key and value into the ListDictionary, the code is as follows −Example Live Demousing System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main(){       ListDictionary dict = new ListDictionary();       dict.Add("1", "One");       dict.Add("2", "Two");       dict.Add("3", "Three");       dict.Add("4", "Four");       dict.Add("5", "Five");       Console.WriteLine("ListDictionary key-value pairs...");       IDictionaryEnumerator demoEnum = dict.GetEnumerator();       while (demoEnum.MoveNext())          Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);    } ... Read More

To get the array of the values of the constants in the current enumeration type, the code is as follows −Example Live Demousing System; public class Demo {    enum Vehicle {Car, Bus, Bike, Airplane}    public static void Main() {       try {          Type type = typeof(int);          string[] str = type.GetEnumNames();          Console.WriteLine("GetEnumNames() to return the constant name = " + str);          Type type2 = type.GetEnumUnderlyingType();          Console.Write("Enum Underlying type = "+type2);          Array arrObj = type.GetEnumValues(); ... Read More

To add the element to HashSet, the code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(String[] args){       HashSet set1 = new HashSet();       set1.Add("A");       set1.Add("B");       set1.Add("C");       set1.Add("D");       set1.Add("E");       set1.Add("F");       set1.Add("G");       set1.Add("H");       Console.WriteLine("Elements in HashSet1...");       foreach (string res in set1){          Console.WriteLine(res);       }       HashSet set2 = new HashSet();       ... Read More

To get the fields of the current Type, the code is as follows −Example Live Demousing System; using System.Reflection; public class Demo {    public static void Main() {       Type type = typeof(System.String);       FieldInfo [] fields = type.GetFields(BindingFlags.Static | BindingFlags.NonPublic);       Console.WriteLine ("Following are the non-public fields=");       foreach (FieldInfo myField in fields) {          Console.WriteLine(myField.ToString());       }    } }OutputThis will produce the following output −Following are the non-public fields= Int32 TrimHead Int32 TrimTail Int32 TrimBoth Int32 charPtrAlignConst Int32 alignConstExampleLet us see another example − Live Demousing System; using System.Reflection; public class Demo {   ... Read More

To get the handle for the Type of a specified object, the code is as follows −Example Live Demousing System; public class Demo {    public static void Main() {       Type type1 = typeof(System.Type);       RuntimeTypeHandle typeHandle = Type.GetTypeHandle(type1);       Type type = Type.GetTypeFromHandle(typeHandle);       Console.WriteLine("Attributes = " + type.Attributes);       Console.WriteLine("Type Referenced = "+ type);    } }OutputThis will produce the following output −Attributes = AutoLayout, AnsiClass, Class, Serializable, BeforeFieldInit Type Referenced = System.RuntimeTypeExampleLet us see another example − Live Demousing System; public class Demo {    public static void ... Read More

To check whether the Dictionary has the specified key or not, the code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main() {       Dictionary dict =       new Dictionary();       dict.Add("One", "John");       dict.Add("Two", "Tom");       dict.Add("Three", "Jacob");       dict.Add("Four", "Kevin");       dict.Add("Five", "Nathan");       Console.WriteLine("Count of elements = "+dict.Count);       Console.WriteLine("Key/value pairs...");       foreach(KeyValuePair res in dict) {          Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value); ... Read More