Display numbers with thousands separators in C#

In C#, you can display numbers with commas as thousands separators and you can also use the CultureInfo class to display numbers with thousands separators based on the culture. Here are some examples:

Displaying a Number with Commas as Thousands Separators

int number = 123456789;
string formattedNumber = string.Format("{0:n0}", number);

In this example, the number variable contains an integer value. The string.Format method is called with the format string "{0:n0}" as the first argument, and the number variable as the second argument. The n0 format specifier specifies that a comma should be added after every three digits of the number. The resulting string is stored in the formattedNumber variable.

Displaying a Number with Thousands Separators by CultureInfo

int number = 123456789;
CultureInfo culture = new CultureInfo("en-US");
string formattedNumber = number.ToString("N0", culture);

In this example, the number variable contains an integer value. The CultureInfo class is used to specify the culture of the formatting. The ToString method is called on the number variable with the format string "N0" as the first argument, and the culture variable as the second argument. The N0 format specifier specifies that a comma should be added after every three digits of the number. The resulting string is stored in the formattedNumber variable.

Adding Comma Thousand Separator to Decimal

decimal number = 123456.789m;
string formattedNumber = number.ToString("0,0.00");

In this example, the number variable contains a decimal value. The ToString method is called on the number variable with the format string "0,0.00" as the argument. The 0 format specifier specifies that a digit should be displayed in that position, the , character specifies the thousands separator, and the . character specifies the decimal separator. The resulting string is stored in the formattedNumber variable.

C# display number with thousands separator

int number = 1234567;
Console.WriteLine("{0:N0}", number);  // Outputs: 1,234,567

Displaying float with thousands separator in C#

float floatValue = 1234567.89f;
Console.WriteLine($"{floatValue:N2}");  // Outputs: 1,234,567.89

C# display double with thousands separator

double doubleValue = 1234567.89;
Console.WriteLine($"{doubleValue:N2}");  // Outputs: 1,234,567.89

Formatting currency with thousands separator in C#

decimal currencyValue = 1234567.89m;
Console.WriteLine($"{currencyValue:C}");  // Outputs: $1,234,567.89

Displaying decimal with thousands separator in C#

decimal decimalValue = 1234567.89m;
Console.WriteLine($"{decimalValue:N2}");  // Outputs: 1,234,567.89

C# format long with thousands separator

long longValue = 123456789012345;
Console.WriteLine("{0:N0}", longValue);  // Outputs: 123,456,789,012,345

C# format number with thousands separator and decimal places

double number = 1234567.89;
Console.WriteLine($"{number:N2}");  // Outputs: 1,234,567.89

Displaying percentages with thousands separator in C#

double percentageValue = 0.753;
Console.WriteLine($"{percentageValue:P2}");  // Outputs: 75.30%

Rounding and formatting numbers with thousands separator in C#

double number = 1234567.89;
string roundedAndFormatted = Math.Round(number, 2).ToString("N2");