Generate Blank SQL Select From C# Class Properties

GenerateBlankSQLSelectFromCSharpClassProperties.cs

using System;
using System.Linq;
using System.Reflection;

public class Program
{
    public static void Main()
    {
        var sql = GenerateBlankSelect<TestClass>();
        Console.WriteLine(sql);
    }

    public static string GenerateBlankSelect<T>()
    {
        var properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);

        var selectColumns = properties.Select(prop =>
        {
            var type = prop.PropertyType;
            string blankValue;

            if (type == typeof(string))
                blankValue = "''";
            else if (type == typeof(int))
                blankValue = "0";
			else if (type == typeof(Nullable<int>))
                blankValue = "0";
			else if (type == typeof(long))
                blankValue = "0";
			else if (type == typeof(Nullable<long>))
                blankValue = "0";
			else if (type == typeof(decimal))
                blankValue = "0";
			else if (type == typeof(Nullable<decimal>))
                blankValue = "0";
			else if (type == typeof(double))
                blankValue = "0";
			else if (type == typeof(short))
                blankValue = "0";
			else if (type == typeof(Int64))
                blankValue = "0";
            else if (type == typeof(DateTime))
                blankValue = "GETDATE()";
			else if (type == typeof(Nullable<System.DateTime>))
                blankValue = "GETDATE()";
			else if (type == typeof(Nullable<bool>))
                blankValue = "0";
            else
                blankValue = "''"; // Fallback for other types
          
            if (prop.Name == "PropFour" || prop.Name == "PropFive")
	    {
	        blankValue = "'In progress'";
            }

            return $"{blankValue} AS {prop.Name}";
        });

        return $"SELECT {string.Join(",", selectColumns)}";
    }
}

public class TestClass 
{
    public string PropOne { get; set;
    }
    public int PropTwo { get; set;
    }
    public DateTime PropThree { get; set;
    }
}