![]() ![]() What are the best practices you need to consider: The async keyword marks methods as asynchronous, while await within async methods halts execution until awaited operations complete. The following table is an overview of some of the key differences. Anonymous types can be used in expression trees, while tuples cannot. The ValueTuple types are mutable, whereas Tuple is read-only. You might want to always use ValueTuple over Tuple, and anonymous types, but there are tradeoffs you should consider. The following C# snippet, uses ValueTuple to project into The System.ValueTuple however, is a value struct type. Furthermore, the System.Tuple types are reference class types. These property names can make it more difficult to understand the intent of the property values, as the property name only provides the ordinal. With the System.Tuple, the instance exposes numbered item properties, such as Item1, and Item2. These tuples flow through the query, just as anonymous types would. Introduced with C# 4.0 and the same functionality exists with tuples as anonymous types when projecting into LINQ queries, you can select properties into tuples. They share the same compiler-generated type information. If two or more anonymous object initializers in the same assembly specify a sequence of properties that are in the same order and that have the same names and types, the compiler treats the objects as instances of the same type. Anonymous types are instantiated by using the new operator, and the property names and types are inferred from the declaration. With LINQ, developers often project results from queries into anonymous types that hold a few select properties from the objects they're working with. ![]()
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