Why can't I call a constructor in itself? | C# Online Compiler

Why can't I call a constructor in itself? by aloisdg

using System;

// http://programmers.stackexchange.com/q/296970/121841

public class Program
{
	public class NumberRange
	{
		public Double Min
		{
			get;
			private set;
		}

		public Double Max
		{
			get;
			private set;
		}

		public NumberRange(Double num)
		{
			Min = num;
			Max = num;
		}

		public NumberRange(Double num1, Double num2)
		{
			if (num1 <= num2)
			{
				Min = num1;
				Max = num2;
			}
			else
			{
				NumberRange(num2, num1);
			//Min = num2;
			//Max = num1;
			}
		}
	}

	public static void Main()
	{
		var n = new NumberRange(1, 2);
		Console.WriteLine("min = {0} max = {1}", n.Min, n.Max);
		
		var n2 = new NumberRange(2, 1);
		Console.WriteLine("min = {0} max = {1}", n2.Min, n2.Max);
	}
}

​x
 
using System;
​
// http://programmers.stackexchange.com/q/296970/121841
​
public class Program
{
    public class NumberRange
    {
        public Double Min
        {
            get;
            private set;
        }
​
        public Double Max
        {
            get;
            private set;
        }
​
        public NumberRange(Double num)
        {
            Min = num;
            Max = num;
        }
​
        public NumberRange(Double num1, Double num2)
        {
            if (num1 <= num2)
            {
                Min = num1;
                Max = num2;
            }
            else
            {
                NumberRange(num2, num1);
            //Min = num2;
            //Max = num1;
            }
        }
    }
​
    public static void Main()
    {
        var n = new NumberRange(1, 2);
        Console.WriteLine("min = {0} max = {1}", n.Min, n.Max);
        
        var n2 = new NumberRange(2, 1);
        Console.WriteLine("min = {0} max = {1}", n2.Min, n2.Max);
    }
}

protobuf-net version: protobuf-net, Version=2.0.0.668, Culture=neutral, PublicKeyToken=257b51d87d2e4d67

Contract for StreamObject:

message StreamObject {
   repeated uint32 StreamBytes = 1 [packed=true];
}

Contract for ByteListObject:

message ByteListObject {
   repeated uint32 StreamBytes = 1 [packed=true];
}

Begin serialization of Data, writeStream.Length = 0
End serialization of Data, writeStream.Length = 0
Streams round-tripped successfully.
Run-time exception (line 217): inputStream was completely loaded into memory before writing to writeStream!

Stack Trace:

[System.InvalidOperationException: inputStream was completely loaded into memory before writing to writeStream!]
   at TestClass.Test() :line 217
   at Program.Main() :line 250

Last Run:	4:13:47 am
Compile:	0.219s
Execute:	0.189s
Memory:	6.84Mb
CPU:	0.188s

View IL Code