Decimal Implicit Conversion (UInt64 to Decimal)

Converts a 64-bit unsigned integer to a Decimal.

This API is not CLS-compliant. 

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static implicit operator decimal (
	ulong value


Type: System.UInt64
A 64-bit unsigned integer.

Return Value

Type: System.Decimal
A Decimal that represents the converted 64-bit unsigned integer.

The following code example converts UInt64 values to Decimal numbers using the UInt64 to Decimal conversion. This conversion is implicit in C#, but requires the op_Implicit operator in Visual Basic and C++. Implicit conversions to Decimal use other methods in these languages.

// Example of the implicit conversion from ulong to decimal.
using System;

class Example
   const string formatter =

   // Convert the ulong argument and display the decimal value.
   public static void DecimalFromUInt64(System.Windows.Controls.TextBlock outputBlock, ulong argument)
      decimal decValue;
      int[] bits;

      // Display the decimal and its binary representation.
      decValue = argument;
      bits = decimal.GetBits(decValue);

      outputBlock.Text += String.Format(formatter, argument, decValue,
          bits[3], bits[2], bits[1], bits[0]) + "\n";

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
      outputBlock.Text += String.Format(
          "This example of the implicit conversion from ulong " +
          "to decimal generates the \nfollowing output. It " +
          "displays the decimal value and its binary " +
          "representation.\n") + "\n";
      outputBlock.Text += String.Format(formatter, "ulong argument",
          "decimal value", "bits[3]", "bits[2]",
          "bits[1]", "bits[0]") + "\n";
      outputBlock.Text += String.Format(formatter, "--------------",
          "-------------", "-------", "-------",
          "-------", "-------") + "\n";

      // Convert ulong values and display the results.
      DecimalFromUInt64(outputBlock, ulong.MinValue);
      DecimalFromUInt64(outputBlock, ulong.MaxValue);
      DecimalFromUInt64(outputBlock, 0xFFFFFFFFFFFF);
      DecimalFromUInt64(outputBlock, 123456789123456789);
      DecimalFromUInt64(outputBlock, 1000000000000000);

This example of the implicit conversion from ulong to decimal generates the
following output. It displays the decimal value and its binary representation.

      ulong argument        decimal value   bits[3]  bits[2]  bits[1]  bits[0]
      --------------        -------------   -------  -------  -------  -------
                   0                    0  00000000 00000000 00000000 00000000
18446744073709551615 18446744073709551615  00000000 00000000 FFFFFFFF FFFFFFFF
     281474976710655      281474976710655  00000000 00000000 0000FFFF FFFFFFFF
  123456789123456789   123456789123456789  00000000 00000000 01B69B4B ACD05F15
    1000000000000000     1000000000000000  00000000 00000000 00038D7E A4C68000


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Community Additions