C# Extension Methods

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#My C# Extension methods for collections and POCO objects. Enjoy! 💥

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Table of Contents:

Collections extension methods

• Array
• Dictionary
• ICollection
• IEnumerable
• IList

POCO extension methods

• ByteArray
• DateTime
• object
• string
• char
• Exception

Collections extension methods

Array extension methods:

• Clear - Sets a range of elements in an array to the default value of each element type.
• Join - Concatenates the elements of an object array, using the specified separator between each element
• ToArrayString - A simple string representation of an array(regular, 2d, jagged)

Dictionary extension methods:

• AddIfNotContainsKey - Add an element with provided key to dictionary if this key is not exist yet
• AddOrUpdate - Add an element with provided key to dictionary, if this key is exist - update value
• ToTuple - Convert this dictionary to list of Tuples, where item1 is key and item2 is a value from this dictionary
• GetValueOrDefault - Get an element with provided key if this key is exist, otherwise default value

ICollection extension methods:

• AddIfNotContains - Add an element to the end of the collection if this value is not exist yet
• AddRange - Adds the elements of the specified Array to the end of the collection
• IsNullOrEmpty - Check if collection is null or empty
• RemoveRange - Removes a range of elements from collection

IEnumerable extension methods:

• Append - Add the object top the end of IEnumerable
• AreAllSame - Check if all elements in IEnumerable are equals
• Concatenate - Concatenates the elements of an IEnumerable to 1 string
• ForEach - Performs the specified action on each element of the IEnumerable
• IsEmpty - Check if IEnumerable is empty
• IsNotEmpty - Check if IEnumerable is not empty
• IsNullOrEmpty - Check if IEnumerable is null or empty
• Join - Concatenates the elements of an IEnumerable, using the specified separator between each element
• Prepend - Add the object at the beginning of IEnumerable
• Shuffle - Shuffle IEnumerable
• PickRandom - Pick N random elements from IEnumerable
• ThisOrEmpty - Safe foreach and more, returns an empty Enumerable if source is null

IList extension methods:

• ChunkBy - Chunk a list to smaller lists with a maximum capacity of the chunk size
• Clone - Clone an collection to new IList
• Push - Adds an object to the collection and return this collection for fluent api

POCO extension methods:

ByteArray extension methods:

• ToBase64String - Converts an byte array to its equivalent string representation that is encoded with base-64.

DateTime extension methods:

• ToUnixTime - convert date to UNIX Epoch time format
• TrimToDay - Trims the time components so that the precision of the resulting time is to the day

object extension methods:

• IfNotNull - Perform action/function on the object if it not null
• IsIn - Determines if an object is contained in a sequence
• IsNotNull - Check if object is NOT null
• IsNull - Check if object is null
• ToStringSafe - like ToString of the object, but not crushes if the object is null
• Try - Try to perform action/function on object
• Yield - Wraps this object instance into an IEnumerable, consisting of a single item
• DeepCopy - Deep copy of object using BinaryFormatter

string extension methods:

• ToDateTime - Convert to DateTime
• ToDecimal - Convert to decimal
• ToDouble - Convert to double
• ToFloat - Convert to float
• ToInt - Convert to int
• ToLong - Convert to long
• ToByteArray - Converts a string into an byte array
• DecodeBase64 - Decodes a string encoded in base-64
• EncodeBase64 - Encodes a string to its equivalent string representation that is encoded in base-64
• RemoveFirst - Remove the number of characters at the start of this string
• RemoveFirstCharacter - Remove the first character of this string
• RemoveLast - Remove the number of characters at the end of this string
• RemoveLastCharacter - Remove the last character of this string
• Reverse - Reverse the sequence of characters in this string
• SurroundWith - Surround this string with some string
• TrimSafe - Performs a trim only if the item is not null
• ToLowerSafe - Performs ToLower() only if input is not null
• ToLowerInvariantSafe - Performs ToLowerInvariant() only if input is not null
• ToUpperSafe - Performs ToUpper() only if input is not null
• ToUpperInvariantSafe - Performs ToUpperInvariant() only if input is not null
• EndsWithIgnoreCase - Determines whether the end of this string matches the specified string
• EqualsIgnoreCase - Determines whether two specified strings have the same value
• IfNullThen - Determines if the string is null or whitespace if yes returns nullAlternateValue
• IsNullOrEmpty - Indicates whether this string is null or an empty string
• IsNullOrWhiteSpace - Indicates whether this string is null, empty, or consists only of white-space characters
• NthIndexOf - Reports the index of matched string regards to occurrenceNum
• OccurrenceNum - Reports the numbers of matches in this string
• StartsWithIgnoreCase - Determines whether the beginning of this string matches the specified string
• ContainsInvariantSafe - String.Contains with StringComparison parameter

char extension methods:

• EqualsIgnoreCase - Determines whether two specified chars have the same value

Exception extension methods:

• GetInnermostException - Get the innermost exception from this exception
• GetInnerExceptions - Get list of inner exceptions from this exception