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‎cheatsheet.md

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@@ -21,6 +21,7 @@ The .NET Logo is copyright of the .NET authors. - https://github.com/dotnet/bran
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## Changelog
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* 2024.02.29 - Initial release
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* 2024.03.08 - Generic math interfaces extended & various small improvements
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# Dotnet basic commands
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More info: https://dotnet.microsoft.com/en-us/platform/upgrade-assistant
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* **SlnGen**
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SlnGen is a Visual Studio solution file generator. Visual Studio solutions generally do not scale well for large project trees. They are scoped views of a set of projects. Enterprise-level builds use custom logic like traversal to convey how they should be built by a hosted build environment. Maintaining Visual Studio solutions becomes hard because you have to keep them in sync with the other build logic. Instead, SlnGen reads the project references of a given project to create a Visual Studio solution on demand. For example, you can run it against a unit test project and be presented with a Visual Studio solution containing the unit test project and all of its project references.
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Install with: `dotnet tool install --global Microsoft.VisualStudio.SlnGen.Tool --add-source https://api.nuget.org/v3/index.json --ignore-failed-sources`
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More info: https://github.com/microsoft/slngen
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* **Roslynator Cli**
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Roslynator is a set of code analysis tools for C#, powered by Roslyn.
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Install with: `dotnet tool install -g roslynator.dotnet.cli`
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More info: https://josefpihrt.github.io/docs/roslynator/cli
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# Project file XML settings
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* Enable implicit usings:
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</PropertyGroup>
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```
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* Disable Source Link Source Revision including in Assembly info:
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```xml
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<PropertyGroup>
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<IncludeSourceRevisionInInformationalVersion>false</IncludeSourceRevisionInInformationalVersion>
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</PropertyGroup>
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```
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# Basic type system
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## Numerical types
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| Type | bytes | Bits | Minimum value | Maximum Value |
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| :-----: | :----: | :------: | :------------------------------------: | :-----------------------------------: |
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| byte | 1 | 8 | 0 | 255 |
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| sbyte | 1 | 8 | -127 | 127 |
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| short | 2 | 16 | -32 768 | 32 767 |
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| ushort | 2 | 16 | 0 | 65 535 |
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| int | 4 | 32 | -2 147 483 648 | 2 147 483 647 |
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| uint | 4 | 32 | 0 | 4 294 967 295 |
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| long | 8 | 64 | -9 223 372 036 854 775 808 | 9 223 372 036 854 775 807 |
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| ulong | 8 | 64 | 0 | 18 446 744 073 709 551 615 |
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| float | 4 | 32 | -3.4028235 x 10<sup>38</sup> | 3.4028235 x 10<sup>38</sup> |
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| double | 8 | 64 | -1.7976931348623157 x 10<sup>308</sup> | 1.7976931348623157 x 10<sup>308</sup> |
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| decimal | 16 | 128 | -7.92 x 10 <sup>28</sup> | 7.92 x 10 <sup>28</sup> |
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| Half | 2 | 16 | -65 504 | 65 504 |
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| nint | 4 or 8 | 32 or 64 | platform dependent signed integer | platform dependent signed integer |
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| nuint | 4 or 8 | 32 or 64 | platform dependent unsigned integer | platform dependent unsigned integer |
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| Type | bytes | Bits | Minimum value | Maximum Value |
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| :-----: | :----: | :------: | :--------------------------------------------------: | :-------------------------------------------------: |
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| byte | 1 | 8 | 0 | 255 |
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| sbyte | 1 | 8 | -127 | 127 |
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| short | 2 | 16 | -32 768 | 32 767 |
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| ushort | 2 | 16 | 0 | 65 535 |
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| int | 4 | 32 | -2 147 483 648 | 2 147 483 647 |
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| uint | 4 | 32 | 0 | 4 294 967 295 |
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| long | 8 | 64 | -9 223 372 036 854 775 808 | 9 223 372 036 854 775 807 |
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| ulong | 8 | 64 | 0 | 18 446 744 073 709 551 615 |
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| Int128 | 16 | 128 | -170 141 183 460 469 231 731 687 303 715 884 105 728 | 170 141 183 460 469 231 731 687 303 715 884 105 727 |
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| UInt128 | 16 | 128 | 0 | 340 282 366 920 938 463 463 374 607 431 768 211 455 |
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| nint | 4 or 8 | 32 or 64 | platform dependent signed integer | platform dependent signed integer |
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| nuint | 4 or 8 | 32 or 64 | platform dependent unsigned integer | platform dependent unsigned integer |
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| float | 4 | 32 | -3.4028235 x 10<sup>38</sup> | 3.4028235 x 10<sup>38</sup> |
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| double | 8 | 64 | -1.7976931348623157 x 10<sup>308</sup> | 1.7976931348623157 x 10<sup>308</sup> |
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| decimal | 16 | 128 | -7.92 x 10 <sup>28</sup> | 7.92 x 10 <sup>28</sup> |
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| Half | 2 | 16 | -65 504 | 65 504 |
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Note: `nint` and `nuint` represent the platforms native integer type. For 32 bit systems this will be a 32 bit integer, so the limitations and properties of `int`
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or `uint` aplies. On 64 bit systems the limitations and properties of `long` and `ulong` applies.
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## Generic Math Interfaces
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![Generic Math Interfaces](img/genericmath1.svg)
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* `IComparable<T>`
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Defines a generalized comparison method that a value type or class implements to create a type-specific comparison method for ordering or sorting its instances.
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* `IConvertible`
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Defines methods that convert the value of the implementing reference or value type to a common language runtime type that has an equivalent value.
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* `IEquatable<T>`
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Defines a generalized method that a value type or class implements to create a type-specific method for determining equality of instances.
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* `IParsable<T>`
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Defines a mechanism for parsing a string to a value.
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* `ISpanParsable<T>`
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Defines a mechanism for parsing a span of characters to a value.
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* `IAdditionOperators<TSelf,TSelf,TSelf>`
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Defines a mechanism for computing the sum of two values. Provides operators: `+`
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* `IBitwiseOperators<TSelf,TSelf,TSelf>`
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Defines a mechanism for performing bitwise operations over two values. Provides operators: `&`, `|`, `^`, `~`
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* `IComparisonOperators<TSelf,TSelf,bool>`
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Defines a mechanism for comparing two values to determine relative order. Provides operators: `>`, `>=`, `<`, `<=`
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* `IDecrementOperators<T>`
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Defines a mechanism for decrementing a given value. Provides operators: `--`
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* `IDivisionOperators<TSelf,TSelf,TSelf>`
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Defines a mechanism for computing the quotient of two values. Provides operators: `/`
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* `IEqualityOperators<TSelf,TSelf,bool>`
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Defines a mechanism for comparing two values to determine equality. Provides operators: `==`, `!=`
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* `IIncrementOperators<T>`
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Defines a mechanism for incrementing a given value. Provides operators: `++`
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* `IModulusOperators<TSelf,TSelf,TSelf>`
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Defines a mechanism for computing the modulus or remainder of two values. Provides operators: `%`
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* `IMultiplyOperators<TSelf,TSelf,TSelf>`
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Defines a mechanism for computing the product of two values. Provides operators: `*`
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* `IShiftOperators<TSelf,int,TSelf>`
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Defines a mechanism for shifting a value by another value. Provides operators: `<<`, `>>`, `<<<`
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* `ISubtractionOperators<TSelf,TSelf,TSelf>`
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Defines a mechanism for computing the difference of two values. Provides operators: `-`
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* `IUnaryNegationOperators<TSelf,TSelf>`
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Defines a mechanism for computing the unary negation of a value. Provides operators: `-`
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* `IUnaryPlusOperators<TSelf,TSelf>`
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Defines a mechanism for computing the unary plus of a value. Provides operators: `+`
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* `IAdditiveIdentity<TSelf,TSelf>`
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Defines a mechanism for getting the additive identity of a given type.
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* `IMultiplicativeIdentity<TSelf,TSelf>`
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Defines a mechanism for getting the multiplicative identity of a given type.
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* `IMinMaxValue<T>`
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Defines a mechanism for getting the minimum and maximum value of a type.
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* `IExponentialFunctions<T>`
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Defines support for exponential functions.
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* `IFloatingPointConstants<T>`
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Defines support for floating-point constants, like `E`, `Pi`, `Tau`
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* `IHyperbolicFunctions<T>`
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Defines support for hyperbolic functions.
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* `ILogarithmicFunctions<T>`
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Defines support for logarithmic functions.
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* `IPowerFunctions<T>`
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Defines support for power functions.
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* `IRootFunctions<T>`
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Defines support for root functions.
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* `ITrigonometricFunctions<T>`
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Defines support for trigonometric functions.
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| Interfaces / Types | SByte, Int16, Int32, Int64 | Int128 | Byte, UInt16, UInt32, UInt64 | UInt128 | Half | Single, Double | Decimal | Complex | BigInteger |
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| :----------------------------------------: | :------------------------: | :----: | :--------------------------: | :-----: | :---: | :------------: | :-----: | :-----: | :--------: |
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| `INumberBase<T>` | √ | √ | √ | √ | √ | √ | √ | √ | √ |
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| `IUnaryPlusOperators<TSelf,TSelf>` | √ | √ | √ | √ | √ | √ | √ | √ | √ |
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| `IAdditiveIdentity<TSelf,TSelf>` | √ | √ | √ | √ | √ | √ | √ | √ | √ |
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| `IMultiplicativeIdentity<TSelf,TSelf>` | √ | √ | √ | √ | √ | √ | √ | √ | √ |
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| `IMinMa√Value<T>` | √ | √ | √ | √ | √ | √ | √ | | |
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| `IMinMaxValue<T>` | √ | √ | √ | √ | √ | √ | √ | | |
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| `IExponentialFunctions<T>` | | | | | √ | √ | | | |
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| `IFloatingPointConstants<T>` | | | | | √ | √ | √ | | |
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| `IHyperbolicFunctions<T>` | | | | | √ | √ | | | |

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