Added sample project files to make it easier for people to get started.

src/ModEntry.cs

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+using StardewModdingAPI;
+
+namespace jibsaramnim.sdv.mods.SampleProject
+{
+    /// <summary>The mod entry point.</summary>
+    internal class ModEntry : Mod
+    {
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>The mod entry point, called after the mod is first loaded.</summary>
+        /// <param name="helper">Provides simplified APIs for writing mods.</param>
+        public override void Entry(IModHelper helper)
+        {
+            this.Monitor.Log("Hello, World! :-)");
+        }
+
+    }
+}

src/SampleMod.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <AssemblyName>SampleMod</AssemblyName>
+    <RootNamespace>jibsaramnim.sdv.mods.SampleMod</RootNamespace>
+    <TargetFramework>net5.0</TargetFramework>
+    <Version>1.0.0</Version>
+    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+    <EnableHarmony>false</EnableHarmony>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Pathoschild.Stardew.ModBuildConfig" Version="4.0.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Reference Include="MonoGame.Framework" HintPath="$(GamePath)\MonoGame.Framework.dll" Private="False" />
+    <Reference Include="Stardew Valley" HintPath="$(GamePath)\Stardew Valley.dll" Private="False" />
+    <Reference Include="StardewValley.GameData" HintPath="$(GamePath)\StardewValley.GameData.dll" Private="False" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="manifest.json" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+</Project>

src/manifest.json

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+{
+    "Name": "SampleMod",
+    "Author": "jibsaramnim",
+    "Version": "1.0.0",
+    "MinimumApiVersion": "3.0.0",
+    "Description": "A sample mod project to get you started. Enjoy! :-)",
+    "UniqueID": "jibsaramnim.sdv.mods.SampleMod",
+    "EntryDll": "SampleMod.dll",
+    "UpdateKeys": []
+}