In C#, interfaces define a contract that classes can implement, specifying a set of methods, properties, and events that the implementing classes must provide. Here’s a list of 50 common interfaces in C# along with brief explanations and common methods for each, along with code snippet examples for some of them:<\/p>\n\n\n\n
GetEnumerator()<\/code><\/li>\n\n\n\n- Explanation<\/strong>: Provides a way to iterate through a collection.<\/li>\n<\/ul>\n\n\n\n
IEnumerable<int> numbers = new List<int> { 1, 2, 3 };\n foreach (var number in numbers) { \/* ... *\/ }<\/code><\/pre>\n\n\n\n\n- IComparable<\/strong>:<\/li>\n<\/ol>\n\n\n\n
\n- Method<\/strong>:
CompareTo(object obj)<\/code><\/li>\n\n\n\n- Explanation<\/strong>: Allows objects to be compared to determine their ordering.<\/li>\n<\/ul>\n\n\n\n
public class MyClass : IComparable<MyClass> { \/* ... *\/ }<\/code><\/pre>\n\n\n\n\n- IEquatable<\/strong>:<\/li>\n<\/ol>\n\n\n\n
\n- Method<\/strong>:
Equals(T other)<\/code><\/li>\n\n\n\n- Explanation<\/strong>: Ensures objects can be compared for equality.<\/li>\n<\/ul>\n\n\n\n
public class MyClass : IEquatable<MyClass> { \/* ... *\/ }<\/code><\/pre>\n\n\n\n\n- IDisposable<\/strong>:<\/li>\n<\/ol>\n\n\n\n
\n- Method<\/strong>:
Dispose()<\/code><\/li>\n\n\n\n- Explanation<\/strong>: Provides a way to release unmanaged resources.<\/li>\n<\/ul>\n\n\n\n
public class MyDisposable : IDisposable { \/* ... *\/ }<\/code><\/pre>\n\n\n\n\n- IList<\/strong>:<\/li>\n<\/ol>\n\n\n\n
\n- Methods<\/strong>:
Add<\/code>, Remove<\/code>, IndexOf<\/code>, Insert<\/code>, Count<\/code>, Clear<\/code>, Contains<\/code>, CopyTo<\/code><\/li>\n\n\n\n- Explanation<\/strong>: Represents a non-generic collection of objects.<\/li>\n<\/ul>\n\n\n\n
IList<int> numbers = new List<int>();\n numbers.Add(42);<\/code><\/pre>\n\n\n\n\n- IDictionary<\/strong>:<\/li>\n<\/ol>\n\n\n\n
\n- Methods<\/strong>:
Add<\/code>, Remove<\/code>, TryGetValue<\/code>, ContainsKey<\/code>, ContainsValue<\/code>, Keys<\/code>, Values<\/code><\/li>\n\n\n\n- Explanation<\/strong>: Represents a collection of key-value pairs.<\/li>\n<\/ul>\n\n\n\n
IDictionary<string, int> dictionary = new Dictionary<string, int>();\n dictionary.Add(\"One\", 1);<\/code><\/pre>\n\n\n\n\n- INotifyPropertyChanged<\/strong>:<\/li>\n<\/ol>\n\n\n\n
\n- Method<\/strong>:
PropertyChanged<\/code><\/li>\n\n\n\n- Explanation<\/strong>: Notifies clients that a property value has changed.<\/li>\n<\/ul>\n\n\n\n
public class MyViewModel : INotifyPropertyChanged { \/* ... *\/ }<\/code><\/pre>\n\n\n\n\n- IEnumerable<\/strong>:<\/li>\n<\/ol>\n\n\n\n
\n- Method<\/strong>:
GetEnumerator()<\/code><\/li>\n\n\n\n- Explanation<\/strong>: Represents a strongly-typed collection of objects.<\/li>\n<\/ul>\n\n\n\n
IEnumerable<int> numbers = new List<int> { 1, 2, 3 };\n foreach (var number in numbers) { \/* ... *\/ }<\/code><\/pre>\n\n\n\n\n- IQueryable<\/strong>:<\/li>\n<\/ol>\n\n\n\n
\n- Methods<\/strong>: Various LINQ methods<\/li>\n\n\n\n
- Explanation<\/strong>: Enables LINQ query operations on data sources.<\/li>\n<\/ul>\n\n\n\n
IQueryable<string> query = dataSource.Where(item => item.Length > 5);<\/code><\/pre>\n\n\n\n\n- IComparable<\/strong>:
- Method<\/strong>:
CompareTo(T other)<\/code><\/li>- Explanation<\/strong>: Allows strongly-typed comparison of objects.<\/li><\/ul>
public class MyClass : IComparable<MyClass> { \/* ... *\/ }<\/code><\/li>\n\n\n\n- IEquatable<\/strong>:
- Method<\/strong>:
Equals(T other)<\/code><\/li>- Explanation<\/strong>: Ensures strongly-typed equality comparison.<\/li><\/ul>
public class MyClass : IEquatable<MyClass> { \/* ... *\/ }<\/code><\/li>\n\n\n\n- IList<\/strong>:
- Methods<\/strong>:
Add<\/code>, Remove<\/code>, IndexOf<\/code>, Insert<\/code>, Count<\/code>, Clear<\/code>, Contains<\/code>, CopyTo<\/code><\/li>- Explanation<\/strong>: Represents a generic list of objects.<\/li><\/ul>
IList<int> numbers = new List<int>(); numbers.Add(42);<\/code><\/li>\n\n\n\n- IDictionary<\/strong>:
- Methods<\/strong>:
Add<\/code>, Remove<\/code>, TryGetValue<\/code>, ContainsKey<\/code>, ContainsValue<\/code>, Keys<\/code>, Values<\/code><\/li>- Explanation<\/strong>: Represents a generic collection of key-value pairs.<\/li><\/ul>
IDictionary<string, int> dictionary = new Dictionary<string, int>(); dictionary.Add(\"One\", 1);<\/code><\/li>\n\n\n\n- IFormattable<\/strong>:
- Method<\/strong>:
ToString(string format, IFormatProvider formatProvider)<\/code><\/li>- Explanation<\/strong>: Provides a mechanism for formatting objects as strings.<\/li><\/ul>
public class MyData : IFormattable { \/* ... *\/ }<\/code><\/li>\n\n\n\n- ICloneable<\/strong>:
- Method<\/strong>:
Clone()<\/code><\/li>- Explanation<\/strong>: Allows an object to create a shallow copy of itself.<\/li><\/ul>
public class MyCloneable : ICloneable { \/* ... *\/ }<\/code><\/li>\n\n\n\n- IConvertible<\/strong>:
- Methods<\/strong>: Various conversion methods<\/li>
- Explanation<\/strong>: Provides methods to convert an object to a different data type.<\/li><\/ul>
int value = Convert.ToInt32(\"42\");<\/code><\/li>\n\n\n\n- IAsyncResult<\/strong>:
- Methods<\/strong>:
AsyncWaitHandle<\/code>, CompletedSynchronously<\/code>, IsCompleted<\/code><\/li>- Explanation<\/strong>: Represents the status of an asynchronous operation.<\/li><\/ul>
IAsyncResult asyncResult = SomeAsyncMethod.BeginInvoke(callback, state);<\/code><\/li>\n\n\n\n- ICustomFormatter<\/strong>:
- Method<\/strong>:
Format(string format, object arg, IFormatProvider formatProvider)<\/code><\/li>- Explanation<\/strong>: Custom string formatting.<\/li><\/ul>
public class MyFormatter : ICustomFormatter { \/* ... *\/ }<\/code><\/li>\n\n\n\n- IEqualityComparer<\/strong>:
- Methods<\/strong>:
Equals<\/code>, GetHashCode<\/code><\/li>- Explanation<\/strong>: Compares objects for equality.<\/li><\/ul>
IEqualityComparer<string> comparer = StringComparer.OrdinalIgnoreCase;<\/code><\/li>\n\n\n\n- IComparer<\/strong>:
- Method<\/strong>:
Compare<\/code><\/li>- Explanation<\/strong>: Compares two objects for ordering.<\/li><\/ul>
IComparer<int> comparer = Comparer<int>.Default;<\/code><\/li>\n\n\n\n- IAsyncResult<\/strong>:
- Methods<\/strong>:
AsyncWaitHandle<\/code>, CompletedSynchronously<\/code>, IsCompleted<\/code><\/li>- Explanation<\/strong>: Represents the status of an asynchronous operation.<\/li><\/ul>
IAsyncResult asyncResult = SomeAsyncMethod.BeginInvoke(callback, state);<\/code><\/li>\n\n\n\n- IConvertible<\/strong>:
- Methods<\/strong>: Various conversion methods<\/li>
- Explanation<\/strong>: Provides methods to convert an object to a different data type.<\/li><\/ul>
int value = Convert.ToInt32(\"42\");<\/code><\/li>\n\n\n\n- ISerializable<\/strong>:
- Methods<\/strong>:
GetObjectData<\/code><\/li>- Explanation<\/strong>: Provides control over object serialization.<\/li><\/ul>
[Serializable] public class MySerializable : ISerializable { \/* ... *\/ }<\/code><\/li>\n\n\n\n