Func delegates

Syntax

public delegate TResult Func<in T, out TResult>(T arg)
public delegate TResult Func<in T1, in T2, out TResult>(T1 arg1, T2 arg2)
public delegate TResult Func<in T1, in T2, in T3, out TResult>(T1 arg1, T2 arg2, T3 arg3)
public delegate TResult Func<in T1, in T2, in T3, in T4, out TResult>(T1 arg1, T2 arg2, T3 arg3, T4 arg4)

Parameters

| Parameter        | Details|
| -----------------| ------ |
| `arg` or `arg1`  | the (first) parameter of the method   |
| `arg2`           | the second parameter of the method |
| `arg3`           | the third parameter of the method |
| `arg4`           | the fourth parameter of the method |
|  `T` or `T1`     | the type of the (first) parameter of the method |
| `T2`             | the type of the second parameter of the method |  
| `T3`             | the type of the third parameter of the method |
| `T4`             | the type of the fourth parameter of the method |
| `TResult`        | the return type of the method|

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