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The DateTime.FromFileTime() method in C# converts a Windows file time to an equivalent local time. Windows file time represents the number of 100-nanosecond intervals that have elapsed since 12:00 midnight, January 1, 1601 A.D. (UTC). Syntax Following is the syntax − public static DateTime FromFileTime(long fileTime); Parameters The method takes one parameter − fileTime − A Windows file time expressed in ticks (100-nanosecond intervals since January 1, 1601 UTC). Return Value Returns a DateTime object that represents the local time equivalent of the Windows file time ... Read More
Comments in C# are used to document and explain code, making it more readable and maintainable. The C# compiler ignores all comments during compilation, so they don't affect the program's performance. C# supports three types of comments: single-line, multi-line, and XML documentation comments. Syntax Following is the syntax for single-line comments − // This is a single-line comment Following is the syntax for multi-line comments − /* This is a multi-line comment that spans multiple lines */ Following is the syntax for XML documentation comments − ... Read More
Tuple comparison was introduced in C# 7.3, allowing you to easily compare two tuples using equality operators. Tuples are compared element-wise, meaning each corresponding element in both tuples must be equal for the tuples to be considered equal. Syntax Following is the syntax for comparing tuples using the equality operator − bool result = tuple1 == tuple2; You can also use the inequality operator − bool result = tuple1 != tuple2; How Tuple Comparison Works Tuple comparison in C# follows these rules: Tuples must have the same ... Read More
To find the volume and surface area of a sphere using C#, we need to apply mathematical formulas that use the sphere's radius. A sphere is a perfectly round three-dimensional object where every point on its surface is equidistant from its center. Sphere Formulas r Sphere Formulas Surface Area = 4πr² Volume = (4/3)πr³ where r = radius of the sphere Formulas The mathematical formulas for a sphere are − ... Read More
The orderby clause in C# is used to sort elements in a collection based on one or more specified criteria. It supports both ascending (default) and descending order, and can be used with LINQ query expressions or method syntax. Syntax Following is the syntax for using orderby in query expression − var result = from element in collection orderby element.Property [ascending|descending] select element; Following is the syntax for ... Read More
When working with C# Lists, attempting to access an element that doesn't exist can throw exceptions. To safely handle empty lists or missing elements, you can use methods like FirstOrDefault() which return the default value for the type instead of throwing an exception. For reference types like strings, the default value is null. For value types like int, float, or double, the default value is 0. For bool, it's false. Syntax Following is the syntax for using FirstOrDefault() on a List − list.FirstOrDefault(); list.FirstOrDefault(condition); You can also specify a custom default value using ... Read More
The DateTime.FromFileTimeUtc() method in C# converts a Windows file time to an equivalent UTC DateTime. This method is useful when working with file timestamps or system-level operations that use Windows file time format, which represents time as the number of 100-nanosecond intervals since January 1, 1601 UTC. Syntax Following is the syntax − public static DateTime FromFileTimeUtc(long fileTime); Parameters The method accepts the following parameter − fileTime − A Windows file time expressed in ticks (100-nanosecond intervals since January 1, 1601 UTC). Return Value Returns a DateTime object ... Read More
Trigonometric functions in C# are part of the Math class in the System namespace. These functions enable you to perform mathematical calculations involving angles, including basic trigonometric operations (Sin, Cos, Tan) and their inverse functions (Asin, Acos, Atan). All angle measurements in C# trigonometric functions are in radians, not degrees. To convert degrees to radians, multiply by π/180. Common Trigonometric Functions Function Description Return Type Math.Sin(double) Returns the sine of the specified angle double Math.Cos(double) Returns the cosine of the specified angle double Math.Tan(double) Returns the ... Read More
In C#, array indexing starts at zero because arrays are fundamentally based on memory addressing and offset calculations. This design choice has deep roots in computer science and provides both efficiency and logical consistency. When an array is created, it occupies a contiguous block of memory. The array name acts as a pointer to the first element's memory address, and accessing elements involves calculating offsets from this base address. Memory Layout and Addressing Consider an integer array with 5 elements stored in memory. Since each int occupies 4 bytes, the memory layout would look like this − ... Read More
A List in C# is a dynamic collection that can grow or shrink in size. To determine the size of a list, you can use two different properties: Count (for the number of actual elements) and Capacity (for the total allocated space). Syntax To get the number of elements in a list − listName.Count To get the total capacity (allocated space) of a list − listName.Capacity Understanding Count vs Capacity Count vs Capacity Count Number of actual ... Read More