C＃| UInt64结构

在C＃中，UInt64结构用于表示从0到18,446,744,073,709,551,615范围的64位无符号整数(也称为ulong数据类型)。它还提供了不同类型的方法来比较此类型的实例，将实例的值转换为其String表示形式，将数字的String表示形式转换为该类型的实例等。此结构在System命名空间下定义。 UInt64结构继承了ValueType类，后者继承了Object类。

领域

Field	Description
MaxValue	Represents the largest possible value of UInt64. This field is constant.
MinValue	Represents the smallest possible value of UInt64. This field is constant.

例子：

// C# program to illustrate the 
// fields of UInt64 struct
using System;
  
class GFG {
  
    // Main Method
    static public void Main()
    {
  
        // Unsigned 64-bit integer
        ulong val = 18446744073709551615;
  
        // Checking the unsigned integer
        if (val.Equals(UInt64.MinValue)) 
        {
            Console.WriteLine("Equal to MinValue!");
        }
  
        else if (val.Equals(UInt64.MaxValue)) 
        {
            Console.WriteLine("Equal to MaxValue!");
        }
  
        else 
        {
            Console.WriteLine("Not Equal!");
        }
    }
}

输出：

Equal to MaxValue!

方法

Method	Description
CompareTo()	Compares the current instance to a specified object or UInt64 and returns an indication of their relative values.
Equals()	Returns a value which shows whether the current instance is equal to a specified object or UInt64.
GetHashCode()	Returns the hash code for the current instance.
GetTypeCode()	Returns the TypeCode for value type UInt64.
Parse()	Converts the string representation of a number to its 64-bit unsigned integer equivalent.
ToString()	Converts the numeric value of the current instance to its equivalent string representation.
TryParse()	Tries to convert the string representation of a number to its 64-bit unsigned integer equivalent. A return value indicates whether the conversion succeeded or failed.

例子：

// C# program to illustrate how to get the 
// hash code of the 64-bit Unsigned integer
using System;
  
class GFG {
  
    // Main Method
    static public void Main()
    {
  
        // UInt64 variable
        ulong myval = 3654121225155;
  
        // Get the hash code
        // Using GetHashCode Method
        int res = myval.GetHashCode();
  
        Console.WriteLine("The hash code of myval is: {0}", res);
    }
}

输出：

The hash code of myval is: -895944559

参考：

• https://docs.microsoft.com/zh-cn/dotnet/api/system.uint64?view=netframework-4.8